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Finding the Fourth Proportional to 217.39, 299.94 and 124.09

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Solution

The fourth proportional to 217.39, 299.94 and 124.09 is: 171.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.39 : 299.94 = 124.09 : x
  2. Step 2: Convert to fraction form
    217.39/299.94 = 124.09/x
  3. Step 3: Cross multiply
    217.39x = 299.94 × 124.09
  4. Step 4: Simplify right side
    217.39x = 37,219.55
  5. Step 5: Solve for x
    x = 37,219.55/217.39
  6. Step 6: Final answer
    x = 171.21

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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.