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Finding the Fourth Proportional to 231,363.70, 319,209.25 and 129,375.38

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Solution

The fourth proportional to 231,363.70, 319,209.25 and 129,375.38 is: 178,497.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,363.70 : 319,209.25 = 129,375.38 : x
  2. Step 2: Convert to fraction form
    231,363.70/319,209.25 = 129,375.38/x
  3. Step 3: Cross multiply
    231,363.70x = 319,209.25 × 129,375.38
  4. Step 4: Simplify right side
    231,363.70x = 41,297,818,018.27
  5. Step 5: Solve for x
    x = 41,297,818,018.27/231,363.70
  6. Step 6: Final answer
    x = 178,497.40

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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.