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Finding the Fourth Proportional to 259,279.20, 388,481.40 and 125,872.20

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Solution

The fourth proportional to 259,279.20, 388,481.40 and 125,872.20 is: 188,595.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,279.20 : 388,481.40 = 125,872.20 : x
  2. Step 2: Convert to fraction form
    259,279.20/388,481.40 = 125,872.20/x
  3. Step 3: Cross multiply
    259,279.20x = 388,481.40 × 125,872.20
  4. Step 4: Simplify right side
    259,279.20x = 48,899,008,477.08
  5. Step 5: Solve for x
    x = 48,899,008,477.08/259,279.20
  6. Step 6: Final answer
    x = 188,595.96

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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.