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Finding the Fourth Proportional to 57,600.11, 86,387.19 and 20,664.11

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Solution

The fourth proportional to 57,600.11, 86,387.19 and 20,664.11 is: 30,991.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,600.11 : 86,387.19 = 20,664.11 : x
  2. Step 2: Convert to fraction form
    57,600.11/86,387.19 = 20,664.11/x
  3. Step 3: Cross multiply
    57,600.11x = 86,387.19 × 20,664.11
  4. Step 4: Simplify right side
    57,600.11x = 1,785,113,964.81
  5. Step 5: Solve for x
    x = 1,785,113,964.81/57,600.11
  6. Step 6: Final answer
    x = 30,991.51

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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.