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Finding the Fourth Proportional to 138,634.81, 207,953.83 and 48,679.75

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Solution

The fourth proportional to 138,634.81, 207,953.83 and 48,679.75 is: 73,020.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,634.81 : 207,953.83 = 48,679.75 : x
  2. Step 2: Convert to fraction form
    138,634.81/207,953.83 = 48,679.75/x
  3. Step 3: Cross multiply
    138,634.81x = 207,953.83 × 48,679.75
  4. Step 4: Simplify right side
    138,634.81x = 10,123,140,776.73
  5. Step 5: Solve for x
    x = 10,123,140,776.73/138,634.81
  6. Step 6: Final answer
    x = 73,020.20

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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.