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Finding the Fourth Proportional to 71,391.90, 107,093.10 and 18,801

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Solution

The fourth proportional to 71,391.90, 107,093.10 and 18,801 is: 28,202.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,391.90 : 107,093.10 = 18,801 : x
  2. Step 2: Convert to fraction form
    71,391.90/107,093.10 = 18,801/x
  3. Step 3: Cross multiply
    71,391.90x = 107,093.10 × 18,801
  4. Step 4: Simplify right side
    71,391.90x = 2,013,457,373.10
  5. Step 5: Solve for x
    x = 2,013,457,373.10/71,391.90
  6. Step 6: Final answer
    x = 28,202.88

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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.