Home / 80,531,998.20-120,797,997.30-40,221,214.20

Finding the Fourth Proportional to 80,531,998.20, 120,797,997.30 and 40,221,214.20

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Solution

The fourth proportional to 80,531,998.20, 120,797,997.30 and 40,221,214.20 is: 60,331,821.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,531,998.20 : 120,797,997.30 = 40,221,214.20 : x
  2. Step 2: Convert to fraction form
    80,531,998.20/120,797,997.30 = 40,221,214.20/x
  3. Step 3: Cross multiply
    80,531,998.20x = 120,797,997.30 × 40,221,214.20
  4. Step 4: Simplify right side
    80,531,998.20x = 4,858,642,124,334,322
  5. Step 5: Solve for x
    x = 4,858,642,124,334,322/80,531,998.20
  6. Step 6: Final answer
    x = 60,331,821.30

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Double scale
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Similar ratio
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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.