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Finding the Fourth Proportional to 71,388.47, 107,082.97 and 18,080.44

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Solution

The fourth proportional to 71,388.47, 107,082.97 and 18,080.44 is: 27,120.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,388.47 : 107,082.97 = 18,080.44 : x
  2. Step 2: Convert to fraction form
    71,388.47/107,082.97 = 18,080.44/x
  3. Step 3: Cross multiply
    71,388.47x = 107,082.97 × 18,080.44
  4. Step 4: Simplify right side
    71,388.47x = 1,936,106,901.20
  5. Step 5: Solve for x
    x = 1,936,106,901.20/71,388.47
  6. Step 6: Final answer
    x = 27,120.72

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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.