Home / 143,916.38-198,605.39-79,387.90

Finding the Fourth Proportional to 143,916.38, 198,605.39 and 79,387.90

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Solution

The fourth proportional to 143,916.38, 198,605.39 and 79,387.90 is: 109,555.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,916.38 : 198,605.39 = 79,387.90 : x
  2. Step 2: Convert to fraction form
    143,916.38/198,605.39 = 79,387.90/x
  3. Step 3: Cross multiply
    143,916.38x = 198,605.39 × 79,387.90
  4. Step 4: Simplify right side
    143,916.38x = 15,766,863,947.33
  5. Step 5: Solve for x
    x = 15,766,863,947.33/143,916.38
  6. Step 6: Final answer
    x = 109,555.73

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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.