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Finding the Fourth Proportional to 71,917.22, 107,865.43 and 21,983.92

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Solution

The fourth proportional to 71,917.22, 107,865.43 and 21,983.92 is: 32,972.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,917.22 : 107,865.43 = 21,983.92 : x
  2. Step 2: Convert to fraction form
    71,917.22/107,865.43 = 21,983.92/x
  3. Step 3: Cross multiply
    71,917.22x = 107,865.43 × 21,983.92
  4. Step 4: Simplify right side
    71,917.22x = 2,371,304,659.26
  5. Step 5: Solve for x
    x = 2,371,304,659.26/71,917.22
  6. Step 6: Final answer
    x = 32,972.70

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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.