SSC GD 2024 PYQ — Question 54

The correct answer is Option 2 i.e. 60.

We know that,

When a, b, c, and d are in proportion ten

a/b = b/c

here, a = 30, b = 120, c = 15, and d = ?

So,

⇒ 30/120 = 15/d

⇒ d = 60

Hence, the fourth proportion is 60