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Finding the Fourth Proportional to 85,103.60, 127,674.36 and 25,943.90

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Solution

The fourth proportional to 85,103.60, 127,674.36 and 25,943.90 is: 38,921.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,103.60 : 127,674.36 = 25,943.90 : x
  2. Step 2: Convert to fraction form
    85,103.60/127,674.36 = 25,943.90/x
  3. Step 3: Cross multiply
    85,103.60x = 127,674.36 × 25,943.90
  4. Step 4: Simplify right side
    85,103.60x = 3,312,370,190.03
  5. Step 5: Solve for x
    x = 3,312,370,190.03/85,103.60
  6. Step 6: Final answer
    x = 38,921.62

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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.