Q. The fourth proportional to 0.2, 0.12 and 0.3 is ?
✅ Correct Answer: (C)
0.18
Explanation: Let 0.2 : 0.12 : : 0.3 : N
∵ 0.2 x N = 0.12 x 0.3
∴ N = (0.12 x 0.3) / 0.2 = 0.18
∵ 0.2 x N = 0.12 x 0.3
∴ N = (0.12 x 0.3) / 0.2 = 0.18
Explanation by: Lalit Singh
Let 0.2 : 0.12 : : 0.3 : N
∵ 0.2 x N = 0.12 x 0.3
∴ N = (0.12 x 0.3) / 0.2 = 0.18
∵ 0.2 x N = 0.12 x 0.3
∴ N = (0.12 x 0.3) / 0.2 = 0.18