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Finding the Fourth Proportional to 139,939.88, 209,806.14 and 84,522.92

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Solution

The fourth proportional to 139,939.88, 209,806.14 and 84,522.92 is: 126,721.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,939.88 : 209,806.14 = 84,522.92 : x
  2. Step 2: Convert to fraction form
    139,939.88/209,806.14 = 84,522.92/x
  3. Step 3: Cross multiply
    139,939.88x = 209,806.14 × 84,522.92
  4. Step 4: Simplify right side
    139,939.88x = 17,733,427,586.73
  5. Step 5: Solve for x
    x = 17,733,427,586.73/139,939.88
  6. Step 6: Final answer
    x = 126,721.76

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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.