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Finding the Fourth Proportional to 207,676.44, 311,540.76 and 81,300.42

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Solution

The fourth proportional to 207,676.44, 311,540.76 and 81,300.42 is: 121,960.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,676.44 : 311,540.76 = 81,300.42 : x
  2. Step 2: Convert to fraction form
    207,676.44/311,540.76 = 81,300.42/x
  3. Step 3: Cross multiply
    207,676.44x = 311,540.76 × 81,300.42
  4. Step 4: Simplify right side
    207,676.44x = 25,328,394,635.12
  5. Step 5: Solve for x
    x = 25,328,394,635.12/207,676.44
  6. Step 6: Final answer
    x = 121,960.85

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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.