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Finding the Fourth Proportional to 132,639.78, 198,961.50 and 73,590.78

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Solution

The fourth proportional to 132,639.78, 198,961.50 and 73,590.78 is: 110,387.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,639.78 : 198,961.50 = 73,590.78 : x
  2. Step 2: Convert to fraction form
    132,639.78/198,961.50 = 73,590.78/x
  3. Step 3: Cross multiply
    132,639.78x = 198,961.50 × 73,590.78
  4. Step 4: Simplify right side
    132,639.78x = 14,641,731,974.97
  5. Step 5: Solve for x
    x = 14,641,731,974.97/132,639.78
  6. Step 6: Final answer
    x = 110,387.19

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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.