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Finding the Fourth Proportional to 172,553.78, 238,121.96 and 99,966.57

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Solution

The fourth proportional to 172,553.78, 238,121.96 and 99,966.57 is: 137,952.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,553.78 : 238,121.96 = 99,966.57 : x
  2. Step 2: Convert to fraction form
    172,553.78/238,121.96 = 99,966.57/x
  3. Step 3: Cross multiply
    172,553.78x = 238,121.96 × 99,966.57
  4. Step 4: Simplify right side
    172,553.78x = 23,804,234,190.09
  5. Step 5: Solve for x
    x = 23,804,234,190.09/172,553.78
  6. Step 6: Final answer
    x = 137,952.55

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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.