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Finding the Fourth Proportional to 71,909.78, 107,913.27 and 25,163.06

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Solution

The fourth proportional to 71,909.78, 107,913.27 and 25,163.06 is: 37,761.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,909.78 : 107,913.27 = 25,163.06 : x
  2. Step 2: Convert to fraction form
    71,909.78/107,913.27 = 25,163.06/x
  3. Step 3: Cross multiply
    71,909.78x = 107,913.27 × 25,163.06
  4. Step 4: Simplify right side
    71,909.78x = 2,715,428,087.81
  5. Step 5: Solve for x
    x = 2,715,428,087.81/71,909.78
  6. Step 6: Final answer
    x = 37,761.60

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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.