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Finding the Fourth Proportional to 225,715, 338,474.06 and 85,375.20

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Solution

The fourth proportional to 225,715, 338,474.06 and 85,375.20 is: 128,025.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,715 : 338,474.06 = 85,375.20 : x
  2. Step 2: Convert to fraction form
    225,715/338,474.06 = 85,375.20/x
  3. Step 3: Cross multiply
    225,715x = 338,474.06 × 85,375.20
  4. Step 4: Simplify right side
    225,715x = 28,897,290,567.31
  5. Step 5: Solve for x
    x = 28,897,290,567.31/225,715
  6. Step 6: Final answer
    x = 128,025.57

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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.