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Finding the Fourth Proportional to 198,338.43, 297,625.88 and 71,988.56

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Solution

The fourth proportional to 198,338.43, 297,625.88 and 71,988.56 is: 108,025.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,338.43 : 297,625.88 = 71,988.56 : x
  2. Step 2: Convert to fraction form
    198,338.43/297,625.88 = 71,988.56/x
  3. Step 3: Cross multiply
    198,338.43x = 297,625.88 × 71,988.56
  4. Step 4: Simplify right side
    198,338.43x = 21,425,656,671.86
  5. Step 5: Solve for x
    x = 21,425,656,671.86/198,338.43
  6. Step 6: Final answer
    x = 108,025.75

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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.