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Finding the Fourth Proportional to 231,920.70, 347,621.85 and 132,128.70

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Solution

The fourth proportional to 231,920.70, 347,621.85 and 132,128.70 is: 198,045.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,920.70 : 347,621.85 = 132,128.70 : x
  2. Step 2: Convert to fraction form
    231,920.70/347,621.85 = 132,128.70/x
  3. Step 3: Cross multiply
    231,920.70x = 347,621.85 × 132,128.70
  4. Step 4: Simplify right side
    231,920.70x = 45,930,823,132.10
  5. Step 5: Solve for x
    x = 45,930,823,132.10/231,920.70
  6. Step 6: Final answer
    x = 198,045.38

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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.