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Finding the Fourth Proportional to 99,993.38, 137,992.34 and 67,737.87

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Solution

The fourth proportional to 99,993.38, 137,992.34 and 67,737.87 is: 93,479.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,993.38 : 137,992.34 = 67,737.87 : x
  2. Step 2: Convert to fraction form
    99,993.38/137,992.34 = 67,737.87/x
  3. Step 3: Cross multiply
    99,993.38x = 137,992.34 × 67,737.87
  4. Step 4: Simplify right side
    99,993.38x = 9,347,306,497.95
  5. Step 5: Solve for x
    x = 9,347,306,497.95/99,993.38
  6. Step 6: Final answer
    x = 93,479.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.