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Finding the Fourth Proportional to 143,992, 198,708.39 and 80,329.72

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Solution

The fourth proportional to 143,992, 198,708.39 and 80,329.72 is: 110,854.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,992 : 198,708.39 = 80,329.72 : x
  2. Step 2: Convert to fraction form
    143,992/198,708.39 = 80,329.72/x
  3. Step 3: Cross multiply
    143,992x = 198,708.39 × 80,329.72
  4. Step 4: Simplify right side
    143,992x = 15,962,189,330.35
  5. Step 5: Solve for x
    x = 15,962,189,330.35/143,992
  6. Step 6: Final answer
    x = 110,854.70

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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.