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Finding the Fourth Proportional to 261,505.06, 391,920.41 and 126,537.41

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Solution

The fourth proportional to 261,505.06, 391,920.41 and 126,537.41 is: 189,642.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,505.06 : 391,920.41 = 126,537.41 : x
  2. Step 2: Convert to fraction form
    261,505.06/391,920.41 = 126,537.41/x
  3. Step 3: Cross multiply
    261,505.06x = 391,920.41 × 126,537.41
  4. Step 4: Simplify right side
    261,505.06x = 49,592,591,987.36
  5. Step 5: Solve for x
    x = 49,592,591,987.36/261,505.06
  6. Step 6: Final answer
    x = 189,642.96

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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.