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Finding the Fourth Proportional to 217.40, 299.99 and 124.14

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Solution

The fourth proportional to 217.40, 299.99 and 124.14 is: 171.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.40 : 299.99 = 124.14 : x
  2. Step 2: Convert to fraction form
    217.40/299.99 = 124.14/x
  3. Step 3: Cross multiply
    217.40x = 299.99 × 124.14
  4. Step 4: Simplify right side
    217.40x = 37,240.76
  5. Step 5: Solve for x
    x = 37,240.76/217.40
  6. Step 6: Final answer
    x = 171.30

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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.