Finding the Fourth Proportional to 87.70, 120.99 and 58.54
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Solution
The fourth proportional to 87.70, 120.99 and 58.54 is: 80.76
Step by Step Solution
- Step 1: Write the proportion equation
87.70 : 120.99 = 58.54 : x - Step 2: Convert to fraction form
87.70/120.99 = 58.54/x - Step 3: Cross multiply
87.70x = 120.99 × 58.54 - Step 4: Simplify right side
87.70x = 7,082.75 - Step 5: Solve for x
x = 7,082.75/87.70 - Step 6: Final answer
x = 80.76
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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.