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Finding the Fourth Proportional to 140,487.90, 193,819.10 and 86,679.60

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Solution

The fourth proportional to 140,487.90, 193,819.10 and 86,679.60 is: 119,584.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,487.90 : 193,819.10 = 86,679.60 : x
  2. Step 2: Convert to fraction form
    140,487.90/193,819.10 = 86,679.60/x
  3. Step 3: Cross multiply
    140,487.90x = 193,819.10 × 86,679.60
  4. Step 4: Simplify right side
    140,487.90x = 16,800,162,060.36
  5. Step 5: Solve for x
    x = 16,800,162,060.36/140,487.90
  6. Step 6: Final answer
    x = 119,584.41

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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.