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Finding the Fourth Proportional to 124,615.82, 171,972.78 and 68,027.60

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Solution

The fourth proportional to 124,615.82, 171,972.78 and 68,027.60 is: 93,879.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,615.82 : 171,972.78 = 68,027.60 : x
  2. Step 2: Convert to fraction form
    124,615.82/171,972.78 = 68,027.60/x
  3. Step 3: Cross multiply
    124,615.82x = 171,972.78 × 68,027.60
  4. Step 4: Simplify right side
    124,615.82x = 11,698,895,488.73
  5. Step 5: Solve for x
    x = 11,698,895,488.73/124,615.82
  6. Step 6: Final answer
    x = 93,879.70

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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.