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Finding the Fourth Proportional to 78,843.70, 118,265.55 and 67,033.90

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Solution

The fourth proportional to 78,843.70, 118,265.55 and 67,033.90 is: 100,550.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,843.70 : 118,265.55 = 67,033.90 : x
  2. Step 2: Convert to fraction form
    78,843.70/118,265.55 = 67,033.90/x
  3. Step 3: Cross multiply
    78,843.70x = 118,265.55 × 67,033.90
  4. Step 4: Simplify right side
    78,843.70x = 7,927,801,052.15
  5. Step 5: Solve for x
    x = 7,927,801,052.15/78,843.70
  6. Step 6: Final answer
    x = 100,550.85

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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.