Finding the Fourth Proportional to 157.53, 217.36 and 91.14
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Solution
The fourth proportional to 157.53, 217.36 and 91.14 is: 125.76
Step by Step Solution
- Step 1: Write the proportion equation
157.53 : 217.36 = 91.14 : x - Step 2: Convert to fraction form
157.53/217.36 = 91.14/x - Step 3: Cross multiply
157.53x = 217.36 × 91.14 - Step 4: Simplify right side
157.53x = 19,810.19 - Step 5: Solve for x
x = 19,810.19/157.53 - Step 6: Final answer
x = 125.76
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.