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Finding the Fourth Proportional to 83,880.40, 125,601.90 and 54,137.20

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Solution

The fourth proportional to 83,880.40, 125,601.90 and 54,137.20 is: 81,064.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,880.40 : 125,601.90 = 54,137.20 : x
  2. Step 2: Convert to fraction form
    83,880.40/125,601.90 = 54,137.20/x
  3. Step 3: Cross multiply
    83,880.40x = 125,601.90 × 54,137.20
  4. Step 4: Simplify right side
    83,880.40x = 6,799,735,180.68
  5. Step 5: Solve for x
    x = 6,799,735,180.68/83,880.40
  6. Step 6: Final answer
    x = 81,064.65

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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.