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Finding the Fourth Proportional to 83,748.80, 125,428.80 and 81,804.80

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Solution

The fourth proportional to 83,748.80, 125,428.80 and 81,804.80 is: 122,517.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,748.80 : 125,428.80 = 81,804.80 : x
  2. Step 2: Convert to fraction form
    83,748.80/125,428.80 = 81,804.80/x
  3. Step 3: Cross multiply
    83,748.80x = 125,428.80 × 81,804.80
  4. Step 4: Simplify right side
    83,748.80x = 10,260,677,898.24
  5. Step 5: Solve for x
    x = 10,260,677,898.24/83,748.80
  6. Step 6: Final answer
    x = 122,517.31

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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.