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Finding the Fourth Proportional to 62,891.20, 86,789.86 and 36,049.28

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Solution

The fourth proportional to 62,891.20, 86,789.86 and 36,049.28 is: 49,748.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,891.20 : 86,789.86 = 36,049.28 : x
  2. Step 2: Convert to fraction form
    62,891.20/86,789.86 = 36,049.28/x
  3. Step 3: Cross multiply
    62,891.20x = 86,789.86 × 36,049.28
  4. Step 4: Simplify right side
    62,891.20x = 3,128,711,639.97
  5. Step 5: Solve for x
    x = 3,128,711,639.97/62,891.20
  6. Step 6: Final answer
    x = 49,748.00

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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.