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Finding the Fourth Proportional to 140,891.10, 211,524.30 and 81,769.20

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Solution

The fourth proportional to 140,891.10, 211,524.30 and 81,769.20 is: 122,762.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,891.10 : 211,524.30 = 81,769.20 : x
  2. Step 2: Convert to fraction form
    140,891.10/211,524.30 = 81,769.20/x
  3. Step 3: Cross multiply
    140,891.10x = 211,524.30 × 81,769.20
  4. Step 4: Simplify right side
    140,891.10x = 17,296,172,791.56
  5. Step 5: Solve for x
    x = 17,296,172,791.56/140,891.10
  6. Step 6: Final answer
    x = 122,762.71

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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.