Find the fourth proportion to $1.25$, $5.75$, and $3.5$. SSC SSC CGL Tier 1 Easy Ratio & Proportion MCQ Question Find the fourth proportion to $1.25$, $5.75$, and $3.5$. Options A. $4.5$ B. $16.1$ C. $12.5$ D. $6.5$ proportionratiofourth proportion