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Finding the Fourth Proportional to 138,684.96, 207,990.99 and 49,921.92

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Solution

The fourth proportional to 138,684.96, 207,990.99 and 49,921.92 is: 74,869.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,684.96 : 207,990.99 = 49,921.92 : x
  2. Step 2: Convert to fraction form
    138,684.96/207,990.99 = 49,921.92/x
  3. Step 3: Cross multiply
    138,684.96x = 207,990.99 × 49,921.92
  4. Step 4: Simplify right side
    138,684.96x = 10,383,309,563.50
  5. Step 5: Solve for x
    x = 10,383,309,563.50/138,684.96
  6. Step 6: Final answer
    x = 74,869.76

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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.