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Finding the Fourth Proportional to 83,943.60, 125,800.20 and 68,391.60

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Solution

The fourth proportional to 83,943.60, 125,800.20 and 68,391.60 is: 102,493.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,943.60 : 125,800.20 = 68,391.60 : x
  2. Step 2: Convert to fraction form
    83,943.60/125,800.20 = 68,391.60/x
  3. Step 3: Cross multiply
    83,943.60x = 125,800.20 × 68,391.60
  4. Step 4: Simplify right side
    83,943.60x = 8,603,676,958.32
  5. Step 5: Solve for x
    x = 8,603,676,958.32/83,943.60
  6. Step 6: Final answer
    x = 102,493.54

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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.