Question

If $25,30,x,72$ are in proportion, then the value of 'x' is?

• A. $30$
• B. $60$
• C. $45$
• D. None

Answer 1

The correct option is B $60$

$25,30,x$ & $72$ are in proportion

i.e, $\frac{25}{30}=\frac{x}{72}\Rightarrow x=72\times \frac{25}{30}$

$x=\frac{(12\times 6)\times (5\times 5)}{(6\times 5)}$

$x=12\times 5$

$x=60$