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Finding the Fourth Proportional to 112,858.92, 169,174.63 and 70,768.74

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Solution

The fourth proportional to 112,858.92, 169,174.63 and 70,768.74 is: 106,081.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,858.92 : 169,174.63 = 70,768.74 : x
  2. Step 2: Convert to fraction form
    112,858.92/169,174.63 = 70,768.74/x
  3. Step 3: Cross multiply
    112,858.92x = 169,174.63 × 70,768.74
  4. Step 4: Simplify right side
    112,858.92x = 11,972,274,778.25
  5. Step 5: Solve for x
    x = 11,972,274,778.25/112,858.92
  6. Step 6: Final answer
    x = 106,081.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.