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Finding the Fourth Proportional to 125,093.78, 172,628.12 and 67,732.11

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Solution

The fourth proportional to 125,093.78, 172,628.12 and 67,732.11 is: 93,469.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,093.78 : 172,628.12 = 67,732.11 : x
  2. Step 2: Convert to fraction form
    125,093.78/172,628.12 = 67,732.11/x
  3. Step 3: Cross multiply
    125,093.78x = 172,628.12 × 67,732.11
  4. Step 4: Simplify right side
    125,093.78x = 11,692,466,474.27
  5. Step 5: Solve for x
    x = 11,692,466,474.27/125,093.78
  6. Step 6: Final answer
    x = 93,469.61

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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.