Home / 198,177.20-297,083.80-85,786.64

Finding the Fourth Proportional to 198,177.20, 297,083.80 and 85,786.64

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Solution

The fourth proportional to 198,177.20, 297,083.80 and 85,786.64 is: 128,601.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,177.20 : 297,083.80 = 85,786.64 : x
  2. Step 2: Convert to fraction form
    198,177.20/297,083.80 = 85,786.64/x
  3. Step 3: Cross multiply
    198,177.20x = 297,083.80 × 85,786.64
  4. Step 4: Simplify right side
    198,177.20x = 25,485,821,000.43
  5. Step 5: Solve for x
    x = 25,485,821,000.43/198,177.20
  6. Step 6: Final answer
    x = 128,601.18

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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.