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Finding the Fourth Proportional to 78,603.38, 108,469.26 and 42,793.52

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Solution

The fourth proportional to 78,603.38, 108,469.26 and 42,793.52 is: 59,053.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,603.38 : 108,469.26 = 42,793.52 : x
  2. Step 2: Convert to fraction form
    78,603.38/108,469.26 = 42,793.52/x
  3. Step 3: Cross multiply
    78,603.38x = 108,469.26 × 42,793.52
  4. Step 4: Simplify right side
    78,603.38x = 4,641,780,904.85
  5. Step 5: Solve for x
    x = 4,641,780,904.85/78,603.38
  6. Step 6: Final answer
    x = 59,053.20

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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.