Finding the Fourth Proportional to 77.18, 106.19 and 58.65
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Solution
The fourth proportional to 77.18, 106.19 and 58.65 is: 80.70
Step by Step Solution
- Step 1: Write the proportion equation
77.18 : 106.19 = 58.65 : x - Step 2: Convert to fraction form
77.18/106.19 = 58.65/x - Step 3: Cross multiply
77.18x = 106.19 × 58.65 - Step 4: Simplify right side
77.18x = 6,227.97 - Step 5: Solve for x
x = 6,227.97/77.18 - Step 6: Final answer
x = 80.70
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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.