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Finding the Fourth Proportional to 198,560.56, 297,862.62 and 86,163.52

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Solution

The fourth proportional to 198,560.56, 297,862.62 and 86,163.52 is: 129,254.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,560.56 : 297,862.62 = 86,163.52 : x
  2. Step 2: Convert to fraction form
    198,560.56/297,862.62 = 86,163.52/x
  3. Step 3: Cross multiply
    198,560.56x = 297,862.62 × 86,163.52
  4. Step 4: Simplify right side
    198,560.56x = 25,664,891,815.62
  5. Step 5: Solve for x
    x = 25,664,891,815.62/198,560.56
  6. Step 6: Final answer
    x = 129,254.73

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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.