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Finding the Fourth Proportional to 221,034.30, 331,551.45 and 71,279.48

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Solution

The fourth proportional to 221,034.30, 331,551.45 and 71,279.48 is: 106,919.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,034.30 : 331,551.45 = 71,279.48 : x
  2. Step 2: Convert to fraction form
    221,034.30/331,551.45 = 71,279.48/x
  3. Step 3: Cross multiply
    221,034.30x = 331,551.45 × 71,279.48
  4. Step 4: Simplify right side
    221,034.30x = 23,632,813,291.49
  5. Step 5: Solve for x
    x = 23,632,813,291.49/221,034.30
  6. Step 6: Final answer
    x = 106,919.21

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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.