Finding the Fourth Proportional to 157.26, 217.05 and 99
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Solution
The fourth proportional to 157.26, 217.05 and 99 is: 136.64
Step by Step Solution
- Step 1: Write the proportion equation
157.26 : 217.05 = 99 : x - Step 2: Convert to fraction form
157.26/217.05 = 99/x - Step 3: Cross multiply
157.26x = 217.05 × 99 - Step 4: Simplify right side
157.26x = 21,487.95 - Step 5: Solve for x
x = 21,487.95/157.26 - Step 6: Final answer
x = 136.64
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.