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Finding the Fourth Proportional to 62,892.40, 86,789.32 and 36,031.20

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Solution

The fourth proportional to 62,892.40, 86,789.32 and 36,031.20 is: 49,721.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,892.40 : 86,789.32 = 36,031.20 : x
  2. Step 2: Convert to fraction form
    62,892.40/86,789.32 = 36,031.20/x
  3. Step 3: Cross multiply
    62,892.40x = 86,789.32 × 36,031.20
  4. Step 4: Simplify right side
    62,892.40x = 3,127,123,346.78
  5. Step 5: Solve for x
    x = 3,127,123,346.78/62,892.40
  6. Step 6: Final answer
    x = 49,721.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.