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Finding the Fourth Proportional to 259,730.80, 389,596.20 and 82,251.70

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Solution

The fourth proportional to 259,730.80, 389,596.20 and 82,251.70 is: 123,377.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,730.80 : 389,596.20 = 82,251.70 : x
  2. Step 2: Convert to fraction form
    259,730.80/389,596.20 = 82,251.70/x
  3. Step 3: Cross multiply
    259,730.80x = 389,596.20 × 82,251.70
  4. Step 4: Simplify right side
    259,730.80x = 32,044,949,763.54
  5. Step 5: Solve for x
    x = 32,044,949,763.54/259,730.80
  6. Step 6: Final answer
    x = 123,377.55

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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.