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Finding the Fourth Proportional to 128,818.92, 193,134.96 and 86,594.27

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Solution

The fourth proportional to 128,818.92, 193,134.96 and 86,594.27 is: 129,828.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,818.92 : 193,134.96 = 86,594.27 : x
  2. Step 2: Convert to fraction form
    128,818.92/193,134.96 = 86,594.27/x
  3. Step 3: Cross multiply
    128,818.92x = 193,134.96 × 86,594.27
  4. Step 4: Simplify right side
    128,818.92x = 16,724,380,872.68
  5. Step 5: Solve for x
    x = 16,724,380,872.68/128,818.92
  6. Step 6: Final answer
    x = 129,828.61

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1.5x scale

Why These Related Problems?

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