Home / 138,631.51-207,916.61-38,764.85

Finding the Fourth Proportional to 138,631.51, 207,916.61 and 38,764.85

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Solution

The fourth proportional to 138,631.51, 207,916.61 and 38,764.85 is: 58,138.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,631.51 : 207,916.61 = 38,764.85 : x
  2. Step 2: Convert to fraction form
    138,631.51/207,916.61 = 38,764.85/x
  3. Step 3: Cross multiply
    138,631.51x = 207,916.61 × 38,764.85
  4. Step 4: Simplify right side
    138,631.51x = 8,059,856,815.86
  5. Step 5: Solve for x
    x = 8,059,856,815.86/138,631.51
  6. Step 6: Final answer
    x = 58,138.71

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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.