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Finding the Fourth Proportional to 80,581.66, 120,873.60 and 21,417.03

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Solution

The fourth proportional to 80,581.66, 120,873.60 and 21,417.03 is: 32,125.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,581.66 : 120,873.60 = 21,417.03 : x
  2. Step 2: Convert to fraction form
    80,581.66/120,873.60 = 21,417.03/x
  3. Step 3: Cross multiply
    80,581.66x = 120,873.60 × 21,417.03
  4. Step 4: Simplify right side
    80,581.66x = 2,588,753,517.41
  5. Step 5: Solve for x
    x = 2,588,753,517.41/80,581.66
  6. Step 6: Final answer
    x = 32,125.84

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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.