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Finding the Fourth Proportional to 89,866.80, 134,781.30 and 45,451.80

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Solution

The fourth proportional to 89,866.80, 134,781.30 and 45,451.80 is: 68,168.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,866.80 : 134,781.30 = 45,451.80 : x
  2. Step 2: Convert to fraction form
    89,866.80/134,781.30 = 45,451.80/x
  3. Step 3: Cross multiply
    89,866.80x = 134,781.30 × 45,451.80
  4. Step 4: Simplify right side
    89,866.80x = 6,126,052,691.34
  5. Step 5: Solve for x
    x = 6,126,052,691.34/89,866.80
  6. Step 6: Final answer
    x = 68,168.14

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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.