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Finding the Fourth Proportional to 138,471.68, 207,618.76 and 58,487.98

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Solution

The fourth proportional to 138,471.68, 207,618.76 and 58,487.98 is: 87,694.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,471.68 : 207,618.76 = 58,487.98 : x
  2. Step 2: Convert to fraction form
    138,471.68/207,618.76 = 58,487.98/x
  3. Step 3: Cross multiply
    138,471.68x = 207,618.76 × 58,487.98
  4. Step 4: Simplify right side
    138,471.68x = 12,143,201,882.50
  5. Step 5: Solve for x
    x = 12,143,201,882.50/138,471.68
  6. Step 6: Final answer
    x = 87,694.48

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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.