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Finding the Fourth Proportional to 136,596.38, 188,621.96 and 85,696.61

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Solution

The fourth proportional to 136,596.38, 188,621.96 and 85,696.61 is: 118,335.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,596.38 : 188,621.96 = 85,696.61 : x
  2. Step 2: Convert to fraction form
    136,596.38/188,621.96 = 85,696.61/x
  3. Step 3: Cross multiply
    136,596.38x = 188,621.96 × 85,696.61
  4. Step 4: Simplify right side
    136,596.38x = 16,164,261,171.96
  5. Step 5: Solve for x
    x = 16,164,261,171.96/136,596.38
  6. Step 6: Final answer
    x = 118,335.95

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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.