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Finding the Fourth Proportional to 80,451.56, 120,680.60 and 38,309.96

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Solution

The fourth proportional to 80,451.56, 120,680.60 and 38,309.96 is: 57,466.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,451.56 : 120,680.60 = 38,309.96 : x
  2. Step 2: Convert to fraction form
    80,451.56/120,680.60 = 38,309.96/x
  3. Step 3: Cross multiply
    80,451.56x = 120,680.60 × 38,309.96
  4. Step 4: Simplify right side
    80,451.56x = 4,623,268,958.78
  5. Step 5: Solve for x
    x = 4,623,268,958.78/80,451.56
  6. Step 6: Final answer
    x = 57,466.49

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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.