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Finding the Fourth Proportional to 71,447.56, 107,171.38 and 18,143.53

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Solution

The fourth proportional to 71,447.56, 107,171.38 and 18,143.53 is: 27,215.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,447.56 : 107,171.38 = 18,143.53 : x
  2. Step 2: Convert to fraction form
    71,447.56/107,171.38 = 18,143.53/x
  3. Step 3: Cross multiply
    71,447.56x = 107,171.38 × 18,143.53
  4. Step 4: Simplify right side
    71,447.56x = 1,944,466,902.92
  5. Step 5: Solve for x
    x = 1,944,466,902.92/71,447.56
  6. Step 6: Final answer
    x = 27,215.30

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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.