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Finding the Fourth Proportional to 57,698.70, 86,556.15 and 18,251.70

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Solution

The fourth proportional to 57,698.70, 86,556.15 and 18,251.70 is: 27,380.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,698.70 : 86,556.15 = 18,251.70 : x
  2. Step 2: Convert to fraction form
    57,698.70/86,556.15 = 18,251.70/x
  3. Step 3: Cross multiply
    57,698.70x = 86,556.15 × 18,251.70
  4. Step 4: Simplify right side
    57,698.70x = 1,579,796,882.96
  5. Step 5: Solve for x
    x = 1,579,796,882.96/57,698.70
  6. Step 6: Final answer
    x = 27,380.11

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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.