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Finding the Fourth Proportional to 83,810.60, 125,715.90 and 74,625.20

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Solution

The fourth proportional to 83,810.60, 125,715.90 and 74,625.20 is: 111,937.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,810.60 : 125,715.90 = 74,625.20 : x
  2. Step 2: Convert to fraction form
    83,810.60/125,715.90 = 74,625.20/x
  3. Step 3: Cross multiply
    83,810.60x = 125,715.90 × 74,625.20
  4. Step 4: Simplify right side
    83,810.60x = 9,381,574,180.68
  5. Step 5: Solve for x
    x = 9,381,574,180.68/83,810.60
  6. Step 6: Final answer
    x = 111,937.80

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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.