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Finding the Fourth Proportional to 198,960.80, 274,560.72 and 108,318.56

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Solution

The fourth proportional to 198,960.80, 274,560.72 and 108,318.56 is: 149,476.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,960.80 : 274,560.72 = 108,318.56 : x
  2. Step 2: Convert to fraction form
    198,960.80/274,560.72 = 108,318.56/x
  3. Step 3: Cross multiply
    198,960.80x = 274,560.72 × 108,318.56
  4. Step 4: Simplify right side
    198,960.80x = 29,740,021,822.96
  5. Step 5: Solve for x
    x = 29,740,021,822.96/198,960.80
  6. Step 6: Final answer
    x = 149,476.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.