Home / 80,620.08-120,929.73-20,648.44

Finding the Fourth Proportional to 80,620.08, 120,929.73 and 20,648.44

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Solution

The fourth proportional to 80,620.08, 120,929.73 and 20,648.44 is: 30,972.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,620.08 : 120,929.73 = 20,648.44 : x
  2. Step 2: Convert to fraction form
    80,620.08/120,929.73 = 20,648.44/x
  3. Step 3: Cross multiply
    80,620.08x = 120,929.73 × 20,648.44
  4. Step 4: Simplify right side
    80,620.08x = 2,497,010,274.12
  5. Step 5: Solve for x
    x = 2,497,010,274.12/80,620.08
  6. Step 6: Final answer
    x = 30,972.56

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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.