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Finding the Fourth Proportional to 201.23, 301.91 and 79.43

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Solution

The fourth proportional to 201.23, 301.91 and 79.43 is: 119.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.23 : 301.91 = 79.43 : x
  2. Step 2: Convert to fraction form
    201.23/301.91 = 79.43/x
  3. Step 3: Cross multiply
    201.23x = 301.91 × 79.43
  4. Step 4: Simplify right side
    201.23x = 23,979.20
  5. Step 5: Solve for x
    x = 23,979.20/201.23
  6. Step 6: Final answer
    x = 119.16

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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.