Finding the Fourth Proportional to 86,545.24, 129,817.86 and 31,139.80
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Solution
The fourth proportional to 86,545.24, 129,817.86 and 31,139.80 is: 46,709.70
Step by Step Solution
- Step 1: Write the proportion equation
86,545.24 : 129,817.86 = 31,139.80 : x - Step 2: Convert to fraction form
86,545.24/129,817.86 = 31,139.80/x - Step 3: Cross multiply
86,545.24x = 129,817.86 × 31,139.80 - Step 4: Simplify right side
86,545.24x = 4,042,502,196.83 - Step 5: Solve for x
x = 4,042,502,196.83/86,545.24 - Step 6: Final answer
x = 46,709.70
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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.