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Finding the Fourth Proportional to 139,676.47, 192,757.88 and 79,249.66

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Solution

The fourth proportional to 139,676.47, 192,757.88 and 79,249.66 is: 109,367.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,676.47 : 192,757.88 = 79,249.66 : x
  2. Step 2: Convert to fraction form
    139,676.47/192,757.88 = 79,249.66/x
  3. Step 3: Cross multiply
    139,676.47x = 192,757.88 × 79,249.66
  4. Step 4: Simplify right side
    139,676.47x = 15,275,996,452.32
  5. Step 5: Solve for x
    x = 15,275,996,452.32/139,676.47
  6. Step 6: Final answer
    x = 109,367.00

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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.