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Finding the Fourth Proportional to 138,187.81, 207,207.87 and 49,392.87

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Solution

The fourth proportional to 138,187.81, 207,207.87 and 49,392.87 is: 74,062.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,187.81 : 207,207.87 = 49,392.87 : x
  2. Step 2: Convert to fraction form
    138,187.81/207,207.87 = 49,392.87/x
  3. Step 3: Cross multiply
    138,187.81x = 207,207.87 × 49,392.87
  4. Step 4: Simplify right side
    138,187.81x = 10,234,590,349.85
  5. Step 5: Solve for x
    x = 10,234,590,349.85/138,187.81
  6. Step 6: Final answer
    x = 74,062.90

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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.