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Finding the Fourth Proportional to 80,371.49, 120,562.25 and 21,207.22

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Solution

The fourth proportional to 80,371.49, 120,562.25 and 21,207.22 is: 31,812.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,371.49 : 120,562.25 = 21,207.22 : x
  2. Step 2: Convert to fraction form
    80,371.49/120,562.25 = 21,207.22/x
  3. Step 3: Cross multiply
    80,371.49x = 120,562.25 × 21,207.22
  4. Step 4: Simplify right side
    80,371.49x = 2,556,790,159.45
  5. Step 5: Solve for x
    x = 2,556,790,159.45/80,371.49
  6. Step 6: Final answer
    x = 31,812.15

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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.