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Finding the Fourth Proportional to 81,269.64, 121,952.88 and 36,287.49

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Solution

The fourth proportional to 81,269.64, 121,952.88 and 36,287.49 is: 54,452.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,269.64 : 121,952.88 = 36,287.49 : x
  2. Step 2: Convert to fraction form
    81,269.64/121,952.88 = 36,287.49/x
  3. Step 3: Cross multiply
    81,269.64x = 121,952.88 × 36,287.49
  4. Step 4: Simplify right side
    81,269.64x = 4,425,363,913.47
  5. Step 5: Solve for x
    x = 4,425,363,913.47/81,269.64
  6. Step 6: Final answer
    x = 54,452.85

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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.