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Finding the Fourth Proportional to 118,469.20, 177,421.92 and 68,445.76

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Solution

The fourth proportional to 118,469.20, 177,421.92 and 68,445.76 is: 102,505.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,469.20 : 177,421.92 = 68,445.76 : x
  2. Step 2: Convert to fraction form
    118,469.20/177,421.92 = 68,445.76/x
  3. Step 3: Cross multiply
    118,469.20x = 177,421.92 × 68,445.76
  4. Step 4: Simplify right side
    118,469.20x = 12,143,778,155.06
  5. Step 5: Solve for x
    x = 12,143,778,155.06/118,469.20
  6. Step 6: Final answer
    x = 102,505.78

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