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Finding the Fourth Proportional to 81,442.73, 122,205.90 and 38,796.46

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Solution

The fourth proportional to 81,442.73, 122,205.90 and 38,796.46 is: 58,214.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,442.73 : 122,205.90 = 38,796.46 : x
  2. Step 2: Convert to fraction form
    81,442.73/122,205.90 = 38,796.46/x
  3. Step 3: Cross multiply
    81,442.73x = 122,205.90 × 38,796.46
  4. Step 4: Simplify right side
    81,442.73x = 4,741,156,311.11
  5. Step 5: Solve for x
    x = 4,741,156,311.11/81,442.73
  6. Step 6: Final answer
    x = 58,214.60

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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.