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Finding the Fourth Proportional to 71,391.88, 107,093.08 and 18,801

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Solution

The fourth proportional to 71,391.88, 107,093.08 and 18,801 is: 28,202.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,391.88 : 107,093.08 = 18,801 : x
  2. Step 2: Convert to fraction form
    71,391.88/107,093.08 = 18,801/x
  3. Step 3: Cross multiply
    71,391.88x = 107,093.08 × 18,801
  4. Step 4: Simplify right side
    71,391.88x = 2,013,456,997.08
  5. Step 5: Solve for x
    x = 2,013,456,997.08/71,391.88
  6. Step 6: Final answer
    x = 28,202.89

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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.