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Finding the Fourth Proportional to 71,793.80, 107,712.30 and 38,529.80

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Solution

The fourth proportional to 71,793.80, 107,712.30 and 38,529.80 is: 57,806.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,793.80 : 107,712.30 = 38,529.80 : x
  2. Step 2: Convert to fraction form
    71,793.80/107,712.30 = 38,529.80/x
  3. Step 3: Cross multiply
    71,793.80x = 107,712.30 × 38,529.80
  4. Step 4: Simplify right side
    71,793.80x = 4,150,133,376.54
  5. Step 5: Solve for x
    x = 4,150,133,376.54/71,793.80
  6. Step 6: Final answer
    x = 57,806.29

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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.