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Finding the Fourth Proportional to 124,469.26, 171,780.54 and 76,721.38

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Solution

The fourth proportional to 124,469.26, 171,780.54 and 76,721.38 is: 105,883.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,469.26 : 171,780.54 = 76,721.38 : x
  2. Step 2: Convert to fraction form
    124,469.26/171,780.54 = 76,721.38/x
  3. Step 3: Cross multiply
    124,469.26x = 171,780.54 × 76,721.38
  4. Step 4: Simplify right side
    124,469.26x = 13,179,240,085.95
  5. Step 5: Solve for x
    x = 13,179,240,085.95/124,469.26
  6. Step 6: Final answer
    x = 105,883.49

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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.