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Finding the Fourth Proportional to 143,645.41, 198,229.30 and 79,979.41

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Solution

The fourth proportional to 143,645.41, 198,229.30 and 79,979.41 is: 110,370.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,645.41 : 198,229.30 = 79,979.41 : x
  2. Step 2: Convert to fraction form
    143,645.41/198,229.30 = 79,979.41/x
  3. Step 3: Cross multiply
    143,645.41x = 198,229.30 × 79,979.41
  4. Step 4: Simplify right side
    143,645.41x = 15,854,262,458.71
  5. Step 5: Solve for x
    x = 15,854,262,458.71/143,645.41
  6. Step 6: Final answer
    x = 110,370.83

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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.