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Finding the Fourth Proportional to 81,056.60, 121,591.92 and 21,892.04

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Solution

The fourth proportional to 81,056.60, 121,591.92 and 21,892.04 is: 32,839.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,056.60 : 121,591.92 = 21,892.04 : x
  2. Step 2: Convert to fraction form
    81,056.60/121,591.92 = 21,892.04/x
  3. Step 3: Cross multiply
    81,056.60x = 121,591.92 × 21,892.04
  4. Step 4: Simplify right side
    81,056.60x = 2,661,895,176.32
  5. Step 5: Solve for x
    x = 2,661,895,176.32/81,056.60
  6. Step 6: Final answer
    x = 32,839.96

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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.