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Finding the Fourth Proportional to 218.81, 301.99 and 125.61

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Solution

The fourth proportional to 218.81, 301.99 and 125.61 is: 173.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.81 : 301.99 = 125.61 : x
  2. Step 2: Convert to fraction form
    218.81/301.99 = 125.61/x
  3. Step 3: Cross multiply
    218.81x = 301.99 × 125.61
  4. Step 4: Simplify right side
    218.81x = 37,932.96
  5. Step 5: Solve for x
    x = 37,932.96/218.81
  6. Step 6: Final answer
    x = 173.36

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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.