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Finding the Fourth Proportional to 272,489.25, 408,799.53 and 85,500.75

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Solution

The fourth proportional to 272,489.25, 408,799.53 and 85,500.75 is: 128,271.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,489.25 : 408,799.53 = 85,500.75 : x
  2. Step 2: Convert to fraction form
    272,489.25/408,799.53 = 85,500.75/x
  3. Step 3: Cross multiply
    272,489.25x = 408,799.53 × 85,500.75
  4. Step 4: Simplify right side
    272,489.25x = 34,952,666,414.65
  5. Step 5: Solve for x
    x = 34,952,666,414.65/272,489.25
  6. Step 6: Final answer
    x = 128,271.73

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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.