4:100::5:?
You asked:
Solve \(4 : 100=5 : ?\) for the variable \(?\).
MathBot Answer:
$$\begin{aligned}? &= 125\end{aligned}$$
Express both ratios as fractions. \[\frac{4}{100} = \frac{5}{?}\]
Cross-multiply and solve for the unknown. $$\begin{aligned}\frac{4}{100} &= \frac{5}{?} \\ 4 ? &= 500 \\ ? &&= 125 \end{aligned}$$