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Finding the Fourth Proportional to 80,578, 120,750.20 and 45,442.96

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Solution

The fourth proportional to 80,578, 120,750.20 and 45,442.96 is: 68,098.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,578 : 120,750.20 = 45,442.96 : x
  2. Step 2: Convert to fraction form
    80,578/120,750.20 = 45,442.96/x
  3. Step 3: Cross multiply
    80,578x = 120,750.20 × 45,442.96
  4. Step 4: Simplify right side
    80,578x = 5,487,246,508.59
  5. Step 5: Solve for x
    x = 5,487,246,508.59/80,578
  6. Step 6: Final answer
    x = 68,098.57

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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.