Home / 80,367.78-120,557.45-21,202.75

Finding the Fourth Proportional to 80,367.78, 120,557.45 and 21,202.75

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Solution

The fourth proportional to 80,367.78, 120,557.45 and 21,202.75 is: 31,805.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,367.78 : 120,557.45 = 21,202.75 : x
  2. Step 2: Convert to fraction form
    80,367.78/120,557.45 = 21,202.75/x
  3. Step 3: Cross multiply
    80,367.78x = 120,557.45 × 21,202.75
  4. Step 4: Simplify right side
    80,367.78x = 2,556,149,472.99
  5. Step 5: Solve for x
    x = 2,556,149,472.99/80,367.78
  6. Step 6: Final answer
    x = 31,805.65

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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.