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Finding the Fourth Proportional to 71,990.64, 107,986.92 and 25,244.88

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Solution

The fourth proportional to 71,990.64, 107,986.92 and 25,244.88 is: 37,867.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,990.64 : 107,986.92 = 25,244.88 : x
  2. Step 2: Convert to fraction form
    71,990.64/107,986.92 = 25,244.88/x
  3. Step 3: Cross multiply
    71,990.64x = 107,986.92 × 25,244.88
  4. Step 4: Simplify right side
    71,990.64x = 2,726,116,836.97
  5. Step 5: Solve for x
    x = 2,726,116,836.97/71,990.64
  6. Step 6: Final answer
    x = 37,867.66

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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.