Finding the Fourth Proportional to 157.74, 217.14 and 136.92
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Solution
The fourth proportional to 157.74, 217.14 and 136.92 is: 188.49
Step by Step Solution
- Step 1: Write the proportion equation
157.74 : 217.14 = 136.92 : x - Step 2: Convert to fraction form
157.74/217.14 = 136.92/x - Step 3: Cross multiply
157.74x = 217.14 × 136.92 - Step 4: Simplify right side
157.74x = 29,731.11 - Step 5: Solve for x
x = 29,731.11/157.74 - Step 6: Final answer
x = 188.49
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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.