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Finding the Fourth Proportional to 198,656.98, 297,978.87 and 86,337.31

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Solution

The fourth proportional to 198,656.98, 297,978.87 and 86,337.31 is: 129,503.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,656.98 : 297,978.87 = 86,337.31 : x
  2. Step 2: Convert to fraction form
    198,656.98/297,978.87 = 86,337.31/x
  3. Step 3: Cross multiply
    198,656.98x = 297,978.87 × 86,337.31
  4. Step 4: Simplify right side
    198,656.98x = 25,726,694,072.64
  5. Step 5: Solve for x
    x = 25,726,694,072.64/198,656.98
  6. Step 6: Final answer
    x = 129,503.10

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.