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Finding the Fourth Proportional to 78,737.52, 108,660.02 and 48,115.62

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Solution

The fourth proportional to 78,737.52, 108,660.02 and 48,115.62 is: 66,400.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,737.52 : 108,660.02 = 48,115.62 : x
  2. Step 2: Convert to fraction form
    78,737.52/108,660.02 = 48,115.62/x
  3. Step 3: Cross multiply
    78,737.52x = 108,660.02 × 48,115.62
  4. Step 4: Simplify right side
    78,737.52x = 5,228,243,990.93
  5. Step 5: Solve for x
    x = 5,228,243,990.93/78,737.52
  6. Step 6: Final answer
    x = 66,400.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.