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Finding the Fourth Proportional to 72,932.38, 99,990.32 and 71,603.85

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Solution

The fourth proportional to 72,932.38, 99,990.32 and 71,603.85 is: 98,168.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,932.38 : 99,990.32 = 71,603.85 : x
  2. Step 2: Convert to fraction form
    72,932.38/99,990.32 = 71,603.85/x
  3. Step 3: Cross multiply
    72,932.38x = 99,990.32 × 71,603.85
  4. Step 4: Simplify right side
    72,932.38x = 7,159,691,874.73
  5. Step 5: Solve for x
    x = 7,159,691,874.73/72,932.38
  6. Step 6: Final answer
    x = 98,168.90

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.