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Finding the Fourth Proportional to 124,993.31, 172,491.32 and 68,404.55

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Solution

The fourth proportional to 124,993.31, 172,491.32 and 68,404.55 is: 94,398.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,993.31 : 172,491.32 = 68,404.55 : x
  2. Step 2: Convert to fraction form
    124,993.31/172,491.32 = 68,404.55/x
  3. Step 3: Cross multiply
    124,993.31x = 172,491.32 × 68,404.55
  4. Step 4: Simplify right side
    124,993.31x = 11,799,190,432.06
  5. Step 5: Solve for x
    x = 11,799,190,432.06/124,993.31
  6. Step 6: Final answer
    x = 94,398.58

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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.