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Finding the Fourth Proportional to 83,902.60, 125,853.90 and 68,542.60

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Solution

The fourth proportional to 83,902.60, 125,853.90 and 68,542.60 is: 102,813.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,902.60 : 125,853.90 = 68,542.60 : x
  2. Step 2: Convert to fraction form
    83,902.60/125,853.90 = 68,542.60/x
  3. Step 3: Cross multiply
    83,902.60x = 125,853.90 × 68,542.60
  4. Step 4: Simplify right side
    83,902.60x = 8,626,353,526.14
  5. Step 5: Solve for x
    x = 8,626,353,526.14/83,902.60
  6. Step 6: Final answer
    x = 102,813.90

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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.