Home / 80,539.48-120,799.83-21,379.75

Finding the Fourth Proportional to 80,539.48, 120,799.83 and 21,379.75

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Solution

The fourth proportional to 80,539.48, 120,799.83 and 21,379.75 is: 32,067.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,539.48 : 120,799.83 = 21,379.75 : x
  2. Step 2: Convert to fraction form
    80,539.48/120,799.83 = 21,379.75/x
  3. Step 3: Cross multiply
    80,539.48x = 120,799.83 × 21,379.75
  4. Step 4: Simplify right side
    80,539.48x = 2,582,670,165.44
  5. Step 5: Solve for x
    x = 2,582,670,165.44/80,539.48
  6. Step 6: Final answer
    x = 32,067.13

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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.