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Finding the Fourth Proportional to 136,977.73, 188,906.87 and 85,995.21

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Solution

The fourth proportional to 136,977.73, 188,906.87 and 85,995.21 is: 118,596.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,977.73 : 188,906.87 = 85,995.21 : x
  2. Step 2: Convert to fraction form
    136,977.73/188,906.87 = 85,995.21/x
  3. Step 3: Cross multiply
    136,977.73x = 188,906.87 × 85,995.21
  4. Step 4: Simplify right side
    136,977.73x = 16,245,086,171.08
  5. Step 5: Solve for x
    x = 16,245,086,171.08/136,977.73
  6. Step 6: Final answer
    x = 118,596.55

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1.5x scale

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.