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Finding the Fourth Proportional to 99,414.81, 137,147.81 and 67,138.94

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Solution

The fourth proportional to 99,414.81, 137,147.81 and 67,138.94 is: 92,621.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,414.81 : 137,147.81 = 67,138.94 : x
  2. Step 2: Convert to fraction form
    99,414.81/137,147.81 = 67,138.94/x
  3. Step 3: Cross multiply
    99,414.81x = 137,147.81 × 67,138.94
  4. Step 4: Simplify right side
    99,414.81x = 9,207,957,565.29
  5. Step 5: Solve for x
    x = 9,207,957,565.29/99,414.81
  6. Step 6: Final answer
    x = 92,621.59

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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.