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Finding the Fourth Proportional to 57,717.80, 86,568.60 and 18,278.90

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Solution

The fourth proportional to 57,717.80, 86,568.60 and 18,278.90 is: 27,415.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,717.80 : 86,568.60 = 18,278.90 : x
  2. Step 2: Convert to fraction form
    57,717.80/86,568.60 = 18,278.90/x
  3. Step 3: Cross multiply
    57,717.80x = 86,568.60 × 18,278.90
  4. Step 4: Simplify right side
    57,717.80x = 1,582,378,782.54
  5. Step 5: Solve for x
    x = 1,582,378,782.54/57,717.80
  6. Step 6: Final answer
    x = 27,415.78

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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.