Finding the Fourth Proportional to 81,640.20, 122,402.70 and 37,288.20
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Solution
The fourth proportional to 81,640.20, 122,402.70 and 37,288.20 is: 55,905.99
Step by Step Solution
- Step 1: Write the proportion equation
81,640.20 : 122,402.70 = 37,288.20 : x - Step 2: Convert to fraction form
81,640.20/122,402.70 = 37,288.20/x - Step 3: Cross multiply
81,640.20x = 122,402.70 × 37,288.20 - Step 4: Simplify right side
81,640.20x = 4,564,176,358.14 - Step 5: Solve for x
x = 4,564,176,358.14/81,640.20 - Step 6: Final answer
x = 55,905.99
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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.