Home / 80,366.86-120,555.30-21,202.59

Finding the Fourth Proportional to 80,366.86, 120,555.30 and 21,202.59

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Solution

The fourth proportional to 80,366.86, 120,555.30 and 21,202.59 is: 31,805.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,366.86 : 120,555.30 = 21,202.59 : x
  2. Step 2: Convert to fraction form
    80,366.86/120,555.30 = 21,202.59/x
  3. Step 3: Cross multiply
    80,366.86x = 120,555.30 × 21,202.59
  4. Step 4: Simplify right side
    80,366.86x = 2,556,084,146.14
  5. Step 5: Solve for x
    x = 2,556,084,146.14/80,366.86
  6. Step 6: Final answer
    x = 31,805.20

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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.