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Finding the Fourth Proportional to 247,906.20, 371,859.30 and 81,672.60

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Solution

The fourth proportional to 247,906.20, 371,859.30 and 81,672.60 is: 122,508.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,906.20 : 371,859.30 = 81,672.60 : x
  2. Step 2: Convert to fraction form
    247,906.20/371,859.30 = 81,672.60/x
  3. Step 3: Cross multiply
    247,906.20x = 371,859.30 × 81,672.60
  4. Step 4: Simplify right side
    247,906.20x = 30,370,715,865.18
  5. Step 5: Solve for x
    x = 30,370,715,865.18/247,906.20
  6. Step 6: Final answer
    x = 122,508.90

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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.