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Finding the Fourth Proportional to 272,500.56, 408,768.12 and 85,519.44

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Solution

The fourth proportional to 272,500.56, 408,768.12 and 85,519.44 is: 128,284.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,500.56 : 408,768.12 = 85,519.44 : x
  2. Step 2: Convert to fraction form
    272,500.56/408,768.12 = 85,519.44/x
  3. Step 3: Cross multiply
    272,500.56x = 408,768.12 × 85,519.44
  4. Step 4: Simplify right side
    272,500.56x = 34,957,620,712.25
  5. Step 5: Solve for x
    x = 34,957,620,712.25/272,500.56
  6. Step 6: Final answer
    x = 128,284.58

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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.