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Finding the Fourth Proportional to 71,388.12, 107,082.43 and 18,080.09

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Solution

The fourth proportional to 71,388.12, 107,082.43 and 18,080.09 is: 27,120.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,388.12 : 107,082.43 = 18,080.09 : x
  2. Step 2: Convert to fraction form
    71,388.12/107,082.43 = 18,080.09/x
  3. Step 3: Cross multiply
    71,388.12x = 107,082.43 × 18,080.09
  4. Step 4: Simplify right side
    71,388.12x = 1,936,059,391.21
  5. Step 5: Solve for x
    x = 1,936,059,391.21/71,388.12
  6. Step 6: Final answer
    x = 27,120.19

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1.5x scale

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.