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Finding the Fourth Proportional to 217,694.85, 300,380.99 and 122,205.57

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Solution

The fourth proportional to 217,694.85, 300,380.99 and 122,205.57 is: 168,622.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,694.85 : 300,380.99 = 122,205.57 : x
  2. Step 2: Convert to fraction form
    217,694.85/300,380.99 = 122,205.57/x
  3. Step 3: Cross multiply
    217,694.85x = 300,380.99 × 122,205.57
  4. Step 4: Simplify right side
    217,694.85x = 36,708,229,489.09
  5. Step 5: Solve for x
    x = 36,708,229,489.09/217,694.85
  6. Step 6: Final answer
    x = 168,622.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.