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Finding the Fourth Proportional to 138,234.87, 206,273.79 and 123,341.40

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Solution

The fourth proportional to 138,234.87, 206,273.79 and 123,341.40 is: 184,049.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,234.87 : 206,273.79 = 123,341.40 : x
  2. Step 2: Convert to fraction form
    138,234.87/206,273.79 = 123,341.40/x
  3. Step 3: Cross multiply
    138,234.87x = 206,273.79 × 123,341.40
  4. Step 4: Simplify right side
    138,234.87x = 25,442,098,041.91
  5. Step 5: Solve for x
    x = 25,442,098,041.91/138,234.87
  6. Step 6: Final answer
    x = 184,049.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.