Find the ratio between the third proportional of 32 and 48 with the third proportional of 4 and 18.

Correct option is C

Given:
First pair: 32 and 48
Second pair: 4 and 18
Formula Used:
Third proportional = (b × b) ÷ a
Solution:
Third proportional for 32 and 48 = $$\frac{48 \times 48}{32} = \frac{2304}{32} = 72$$​​

Third proportional for 4 and 18 = $$\frac{18 \times 18}{4} = \frac{324}{4} = 81$$​​
=> Ratio = 72 ÷ 81 = 8 : 9