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Finding the Fourth Proportional to 80,605.78, 120,929.16 and 47,353.96

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Solution

The fourth proportional to 80,605.78, 120,929.16 and 47,353.96 is: 71,042.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,605.78 : 120,929.16 = 47,353.96 : x
  2. Step 2: Convert to fraction form
    80,605.78/120,929.16 = 47,353.96/x
  3. Step 3: Cross multiply
    80,605.78x = 120,929.16 × 47,353.96
  4. Step 4: Simplify right side
    80,605.78x = 5,726,474,605.47
  5. Step 5: Solve for x
    x = 5,726,474,605.47/80,605.78
  6. Step 6: Final answer
    x = 71,042.98

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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.