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Finding the Fourth Proportional to 136,382.88, 188,230.80 and 85,414.92

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Solution

The fourth proportional to 136,382.88, 188,230.80 and 85,414.92 is: 117,886.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,382.88 : 188,230.80 = 85,414.92 : x
  2. Step 2: Convert to fraction form
    136,382.88/188,230.80 = 85,414.92/x
  3. Step 3: Cross multiply
    136,382.88x = 188,230.80 × 85,414.92
  4. Step 4: Simplify right side
    136,382.88x = 16,077,718,723.54
  5. Step 5: Solve for x
    x = 16,077,718,723.54/136,382.88
  6. Step 6: Final answer
    x = 117,886.63

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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.