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Finding the Fourth Proportional to 78,601.44, 108,469.92 and 42,791.44

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Solution

The fourth proportional to 78,601.44, 108,469.92 and 42,791.44 is: 59,052.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,601.44 : 108,469.92 = 42,791.44 : x
  2. Step 2: Convert to fraction form
    78,601.44/108,469.92 = 42,791.44/x
  3. Step 3: Cross multiply
    78,601.44x = 108,469.92 × 42,791.44
  4. Step 4: Simplify right side
    78,601.44x = 4,641,584,073.48
  5. Step 5: Solve for x
    x = 4,641,584,073.48/78,601.44
  6. Step 6: Final answer
    x = 59,052.15

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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.