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Finding the Fourth Proportional to 72,691.20, 108,861.84 and 49,246.56

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Solution

The fourth proportional to 72,691.20, 108,861.84 and 49,246.56 is: 73,751.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,691.20 : 108,861.84 = 49,246.56 : x
  2. Step 2: Convert to fraction form
    72,691.20/108,861.84 = 49,246.56/x
  3. Step 3: Cross multiply
    72,691.20x = 108,861.84 × 49,246.56
  4. Step 4: Simplify right side
    72,691.20x = 5,361,071,135.27
  5. Step 5: Solve for x
    x = 5,361,071,135.27/72,691.20
  6. Step 6: Final answer
    x = 73,751.31

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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.