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Finding the Fourth Proportional to 80,860.20, 120,998.70 and 54,616.20

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Solution

The fourth proportional to 80,860.20, 120,998.70 and 54,616.20 is: 81,727.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,860.20 : 120,998.70 = 54,616.20 : x
  2. Step 2: Convert to fraction form
    80,860.20/120,998.70 = 54,616.20/x
  3. Step 3: Cross multiply
    80,860.20x = 120,998.70 × 54,616.20
  4. Step 4: Simplify right side
    80,860.20x = 6,608,489,198.94
  5. Step 5: Solve for x
    x = 6,608,489,198.94/80,860.20
  6. Step 6: Final answer
    x = 81,727.34

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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.