Finding the Fourth Proportional to 86,545.80, 129,818.70 and 57,021.30
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Solution
The fourth proportional to 86,545.80, 129,818.70 and 57,021.30 is: 85,531.95
Step by Step Solution
- Step 1: Write the proportion equation
86,545.80 : 129,818.70 = 57,021.30 : x - Step 2: Convert to fraction form
86,545.80/129,818.70 = 57,021.30/x - Step 3: Cross multiply
86,545.80x = 129,818.70 × 57,021.30 - Step 4: Simplify right side
86,545.80x = 7,402,431,038.31 - Step 5: Solve for x
x = 7,402,431,038.31/86,545.80 - Step 6: Final answer
x = 85,531.95
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.