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Finding the Fourth Proportional to 71,202.21, 106,799.67 and 18,609.72

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Solution

The fourth proportional to 71,202.21, 106,799.67 and 18,609.72 is: 27,913.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,202.21 : 106,799.67 = 18,609.72 : x
  2. Step 2: Convert to fraction form
    71,202.21/106,799.67 = 18,609.72/x
  3. Step 3: Cross multiply
    71,202.21x = 106,799.67 × 18,609.72
  4. Step 4: Simplify right side
    71,202.21x = 1,987,511,954.79
  5. Step 5: Solve for x
    x = 1,987,511,954.79/71,202.21
  6. Step 6: Final answer
    x = 27,913.63

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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.