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Home Aptitude Ratio and Proportion Comments

  • Question
  • What is the third proportional to 16 and 36 ?


  • Options
  • A. 81
  • B. 79
  • C. 84
  • D. 88

  • Correct Answer
  • 81 

    Explanation
    f C is the third proportional to A and B, then A/B = B/C If x is the third proportional to 16 and 36, then 16/36 = 36/x => 4/9 = 36/x => x = 36 * 9/4 => x = 9 * 9 => x = 81

  • Ratio and Proportion problems


    Search Results


    • 1. The number of oranges in three baskets are in the ratio of 3 : 4 : 5. In which ratio the no. of oranges in first two baskets must be increased so that the new ratio becomes 5 : 4 : 3?

    • Options
    • A. 1:3
    • B. 2:1
    • C. 3:4
    • D. 2:3
    • Discuss
    • 2. Alloy A contains 40% gold and 60% silver. Alloy B contains 35% gold and 40% silver and 25% copper. Alloys A and B are mixed in the ratio of 1:4 .What is the ratio of gold and silver in the newly formed alloy is?

    • Options
    • A. 20% and 30%
    • B. 36% and 44%
    • C. 25% and 35%
    • D. 49% and 36%
    • Discuss
    • 3. The concentration of petrol in three different mixtures (petrol and kerosene) is 1/2 , 3/5 and 4/5 respectively. If 2 litres, 3 litres and 1 litre are taken from these three different vessels and mixed. what is the ratio of petrol and kerosene in the new mixture?

    • Options
    • A. 4:5
    • B. 3:2
    • C. 3:5
    • D. 2:3
    • Discuss
    • 4. In a college, the ratio of the number of boys to girls is 8 : 5. If there are 160 girls, the total number of students in the college is

    • Options
    • A. 100
    • B. 250
    • C. 260
    • D. 416
    • Discuss
    • 5. A dog takes 3 leaps for every 5 leaps of a hare. If one leap of the dog is equal to 3 leaps of the hare, the ratio of the speed of the dog to that of the hare is :

    • Options
    • A. 9:5
    • B. 2:3
    • C. 4:7
    • D. 5:6
    • Discuss
    • 6. Divide Rs.6500 among A, B and C so that after spending 90%, 75% and 60% of their respective saving was in the ratio of 3: 5: 6

    • Options
    • A. A=1000, B=2000, C=1500
    • B. A=3000, B=1000, C=1500
    • C. A=3000, B=2000, C=1500
    • D. A=3000, B=2000, C=1000
    • Discuss
    • 7. The ratio of male and female in a city is 7 : 8 respectively and percentage of children among male and female is 25 and 20 respectively. If number of adult females is 156800, what is the total population of the city?

    • Options
    • A. 4,12,480
    • B. 3,67,500
    • C. 5,44,700
    • D. 2,98,948
    • Discuss
    • 8. The third proportional to x2-y2 and x-y is :

    • Options
    • A. (x + y )
    • B. (x - y)
    • C. (x + y) / ( x - y)
    • D. (x -y) / ( x + y)
    • Discuss
    • 9. If 76 is divided into four parts proportional to 7, 5, 3, 4, then the smallest part is:

    • Options
    • A. 12
    • B. 15
    • C. 16
    • D. 19
    • Discuss
    • 10. The wages of labourers in a factory increases in the ratio 22:25 and there was a reduction in the number of labourers in the ratio 15:11. Find the original wage bill if the present bill is Rs. 5000 ?

    • Options
    • A. Rs. 5500
    • B. Rs. 6000
    • C. Rs. 6200
    • D. Rs. 6350
    • Discuss


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