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Finding the Fourth Proportional to 85,251.40, 127,877.10 and 77,086.60

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Solution

The fourth proportional to 85,251.40, 127,877.10 and 77,086.60 is: 115,629.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,251.40 : 127,877.10 = 77,086.60 : x
  2. Step 2: Convert to fraction form
    85,251.40/127,877.10 = 77,086.60/x
  3. Step 3: Cross multiply
    85,251.40x = 127,877.10 × 77,086.60
  4. Step 4: Simplify right side
    85,251.40x = 9,857,610,856.86
  5. Step 5: Solve for x
    x = 9,857,610,856.86/85,251.40
  6. Step 6: Final answer
    x = 115,629.90

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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.