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Finding the Fourth Proportional to 198,616.78, 297,831.55 and 72,167.88

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Solution

The fourth proportional to 198,616.78, 297,831.55 and 72,167.88 is: 108,217.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,616.78 : 297,831.55 = 72,167.88 : x
  2. Step 2: Convert to fraction form
    198,616.78/297,831.55 = 72,167.88/x
  3. Step 3: Cross multiply
    198,616.78x = 297,831.55 × 72,167.88
  4. Step 4: Simplify right side
    198,616.78x = 21,493,871,560.61
  5. Step 5: Solve for x
    x = 21,493,871,560.61/198,616.78
  6. Step 6: Final answer
    x = 108,217.80

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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.