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Finding the Fourth Proportional to 80,080.97, 120,193.91 and 42,672.65

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Solution

The fourth proportional to 80,080.97, 120,193.91 and 42,672.65 is: 64,047.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,080.97 : 120,193.91 = 42,672.65 : x
  2. Step 2: Convert to fraction form
    80,080.97/120,193.91 = 42,672.65/x
  3. Step 3: Cross multiply
    80,080.97x = 120,193.91 × 42,672.65
  4. Step 4: Simplify right side
    80,080.97x = 5,128,991,839.23
  5. Step 5: Solve for x
    x = 5,128,991,839.23/80,080.97
  6. Step 6: Final answer
    x = 64,047.58

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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.