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Finding the Fourth Proportional to 71,793.10, 107,712.60 and 21,882.70

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Solution

The fourth proportional to 71,793.10, 107,712.60 and 21,882.70 is: 32,831.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,793.10 : 107,712.60 = 21,882.70 : x
  2. Step 2: Convert to fraction form
    71,793.10/107,712.60 = 21,882.70/x
  3. Step 3: Cross multiply
    71,793.10x = 107,712.60 × 21,882.70
  4. Step 4: Simplify right side
    71,793.10x = 2,357,042,512.02
  5. Step 5: Solve for x
    x = 2,357,042,512.02/71,793.10
  6. Step 6: Final answer
    x = 32,831.05

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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.