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Finding the Fourth Proportional to 64,474.20, 96,711.30 and 40,854.60

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Solution

The fourth proportional to 64,474.20, 96,711.30 and 40,854.60 is: 61,281.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,474.20 : 96,711.30 = 40,854.60 : x
  2. Step 2: Convert to fraction form
    64,474.20/96,711.30 = 40,854.60/x
  3. Step 3: Cross multiply
    64,474.20x = 96,711.30 × 40,854.60
  4. Step 4: Simplify right side
    64,474.20x = 3,951,101,476.98
  5. Step 5: Solve for x
    x = 3,951,101,476.98/64,474.20
  6. Step 6: Final answer
    x = 61,281.90

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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.