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Finding the Fourth Proportional to 71,959.61, 107,939.43 and 38,695.34

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Solution

The fourth proportional to 71,959.61, 107,939.43 and 38,695.34 is: 58,043.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,959.61 : 107,939.43 = 38,695.34 : x
  2. Step 2: Convert to fraction form
    71,959.61/107,939.43 = 38,695.34/x
  3. Step 3: Cross multiply
    71,959.61x = 107,939.43 × 38,695.34
  4. Step 4: Simplify right side
    71,959.61x = 4,176,753,213.10
  5. Step 5: Solve for x
    x = 4,176,753,213.10/71,959.61
  6. Step 6: Final answer
    x = 58,043.02

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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.