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Finding the Fourth Proportional to 127,969.40, 192,112.05 and 80,584.40

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Solution

The fourth proportional to 127,969.40, 192,112.05 and 80,584.40 is: 120,976.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,969.40 : 192,112.05 = 80,584.40 : x
  2. Step 2: Convert to fraction form
    127,969.40/192,112.05 = 80,584.40/x
  3. Step 3: Cross multiply
    127,969.40x = 192,112.05 × 80,584.40
  4. Step 4: Simplify right side
    127,969.40x = 15,481,234,282.02
  5. Step 5: Solve for x
    x = 15,481,234,282.02/127,969.40
  6. Step 6: Final answer
    x = 120,976.06

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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.