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Finding the Fourth Proportional to 71,708.20, 107,562.30 and 38,530.60

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Solution

The fourth proportional to 71,708.20, 107,562.30 and 38,530.60 is: 57,795.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,708.20 : 107,562.30 = 38,530.60 : x
  2. Step 2: Convert to fraction form
    71,708.20/107,562.30 = 38,530.60/x
  3. Step 3: Cross multiply
    71,708.20x = 107,562.30 × 38,530.60
  4. Step 4: Simplify right side
    71,708.20x = 4,144,439,956.38
  5. Step 5: Solve for x
    x = 4,144,439,956.38/71,708.20
  6. Step 6: Final answer
    x = 57,795.90

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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.