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Finding the Fourth Proportional to 71,358.73, 98,470.81 and 39,086.91

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Solution

The fourth proportional to 71,358.73, 98,470.81 and 39,086.91 is: 53,937.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,358.73 : 98,470.81 = 39,086.91 : x
  2. Step 2: Convert to fraction form
    71,358.73/98,470.81 = 39,086.91/x
  3. Step 3: Cross multiply
    71,358.73x = 98,470.81 × 39,086.91
  4. Step 4: Simplify right side
    71,358.73x = 3,848,919,688.10
  5. Step 5: Solve for x
    x = 3,848,919,688.10/71,358.73
  6. Step 6: Final answer
    x = 53,937.61

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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.