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Finding the Fourth Proportional to 57,597.11, 86,382.70 and 20,661.11

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Solution

The fourth proportional to 57,597.11, 86,382.70 and 20,661.11 is: 30,987.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,597.11 : 86,382.70 = 20,661.11 : x
  2. Step 2: Convert to fraction form
    57,597.11/86,382.70 = 20,661.11/x
  3. Step 3: Cross multiply
    57,597.11x = 86,382.70 × 20,661.11
  4. Step 4: Simplify right side
    57,597.11x = 1,784,761,983.23
  5. Step 5: Solve for x
    x = 1,784,761,983.23/57,597.11
  6. Step 6: Final answer
    x = 30,987.01

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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.