Ratio and Proportion - Quantitative Aptitude (MCQ) questions for Q. 28168

a. 135

b. 150

c. 124

d. 105

 

Values of 2^nd number = 7 and 6 (They are not the same)

Make the values of 2^nd number same as follows -

Multiply 3:7 up and down with 6 as shown



Multiply 6:5 up and down with 7 as shown



Values of 2^nd number are now same = 42

1^st number : 2^nd number = 18 : 42

2^nd number : 3^rd number = 42 : 35

1^st number : 2^nd number : 3rd number = 18 : 42 : 35

Common factor helps in finding actual values easily

So, take ‘A’ as common factor.

So now the 3 numbers are 18A, 42A and 35A

18A + 42A + 35A = 285

A = 3

3^rd number = 35A = 35 x 3 = 105

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