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Finding the Fourth Proportional to 87,472.70, 131,213.20 and 28,313

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Solution

The fourth proportional to 87,472.70, 131,213.20 and 28,313 is: 42,470.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,472.70 : 131,213.20 = 28,313 : x
  2. Step 2: Convert to fraction form
    87,472.70/131,213.20 = 28,313/x
  3. Step 3: Cross multiply
    87,472.70x = 131,213.20 × 28,313
  4. Step 4: Simplify right side
    87,472.70x = 3,715,039,331.60
  5. Step 5: Solve for x
    x = 3,715,039,331.60/87,472.70
  6. Step 6: Final answer
    x = 42,470.84

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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.