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Finding the Fourth Proportional to 139,760.97, 209,247.76 and 125,589.21

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Solution

The fourth proportional to 139,760.97, 209,247.76 and 125,589.21 is: 188,030.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,760.97 : 209,247.76 = 125,589.21 : x
  2. Step 2: Convert to fraction form
    139,760.97/209,247.76 = 125,589.21/x
  3. Step 3: Cross multiply
    139,760.97x = 209,247.76 × 125,589.21
  4. Step 4: Simplify right side
    139,760.97x = 26,279,260,872.67
  5. Step 5: Solve for x
    x = 26,279,260,872.67/139,760.97
  6. Step 6: Final answer
    x = 188,030.04

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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.