Question

Determine if the following are in proportion.

$15,45,40,120$

Answer 1

First will combine two terms and find the ratio of those two terms

$$\begin{gathered} 15,45,40,120 \\ Here,\frac{15}{45}=\frac{1}{3} \\ And\frac{40}{120}=\frac{1}{3} \end{gathered}$$

Hence, $15:45=40:120$

Hence, The given set of numbers are in a proportion