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Finding the Fourth Proportional to 136,804.73, 188,793.70 and 85,819.61

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Solution

The fourth proportional to 136,804.73, 188,793.70 and 85,819.61 is: 118,433.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,804.73 : 188,793.70 = 85,819.61 : x
  2. Step 2: Convert to fraction form
    136,804.73/188,793.70 = 85,819.61/x
  3. Step 3: Cross multiply
    136,804.73x = 188,793.70 × 85,819.61
  4. Step 4: Simplify right side
    136,804.73x = 16,202,201,382.66
  5. Step 5: Solve for x
    x = 16,202,201,382.66/136,804.73
  6. Step 6: Final answer
    x = 118,433.05

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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.