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Finding the Fourth Proportional to 220,857.30, 331,372.35 and 80,630.10

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Solution

The fourth proportional to 220,857.30, 331,372.35 and 80,630.10 is: 120,976.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,857.30 : 331,372.35 = 80,630.10 : x
  2. Step 2: Convert to fraction form
    220,857.30/331,372.35 = 80,630.10/x
  3. Step 3: Cross multiply
    220,857.30x = 331,372.35 × 80,630.10
  4. Step 4: Simplify right side
    220,857.30x = 26,718,585,717.74
  5. Step 5: Solve for x
    x = 26,718,585,717.74/220,857.30
  6. Step 6: Final answer
    x = 120,976.69

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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.