Finding the Fourth Proportional to 76,913.20, 115,369.80 and 66,545.20
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Solution
The fourth proportional to 76,913.20, 115,369.80 and 66,545.20 is: 99,817.80
Step by Step Solution
- Step 1: Write the proportion equation
76,913.20 : 115,369.80 = 66,545.20 : x - Step 2: Convert to fraction form
76,913.20/115,369.80 = 66,545.20/x - Step 3: Cross multiply
76,913.20x = 115,369.80 × 66,545.20 - Step 4: Simplify right side
76,913.20x = 7,677,306,414.96 - Step 5: Solve for x
x = 7,677,306,414.96/76,913.20 - Step 6: Final answer
x = 99,817.80
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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.