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Finding the Fourth Proportional to 128,886.90, 193,233.15 and 84,524.82

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Solution

The fourth proportional to 128,886.90, 193,233.15 and 84,524.82 is: 126,723.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,886.90 : 193,233.15 = 84,524.82 : x
  2. Step 2: Convert to fraction form
    128,886.90/193,233.15 = 84,524.82/x
  3. Step 3: Cross multiply
    128,886.90x = 193,233.15 × 84,524.82
  4. Step 4: Simplify right side
    128,886.90x = 16,332,997,221.78
  5. Step 5: Solve for x
    x = 16,332,997,221.78/128,886.90
  6. Step 6: Final answer
    x = 126,723.49

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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.