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Finding the Fourth Proportional to 99,363.68, 137,121.78 and 56,922.38

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Solution

The fourth proportional to 99,363.68, 137,121.78 and 56,922.38 is: 78,552.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,363.68 : 137,121.78 = 56,922.38 : x
  2. Step 2: Convert to fraction form
    99,363.68/137,121.78 = 56,922.38/x
  3. Step 3: Cross multiply
    99,363.68x = 137,121.78 × 56,922.38
  4. Step 4: Simplify right side
    99,363.68x = 7,805,298,067.44
  5. Step 5: Solve for x
    x = 7,805,298,067.44/99,363.68
  6. Step 6: Final answer
    x = 78,552.83

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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.