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Finding the Fourth Proportional to 167.05, 249.82 and 128.01

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Solution

The fourth proportional to 167.05, 249.82 and 128.01 is: 191.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.05 : 249.82 = 128.01 : x
  2. Step 2: Convert to fraction form
    167.05/249.82 = 128.01/x
  3. Step 3: Cross multiply
    167.05x = 249.82 × 128.01
  4. Step 4: Simplify right side
    167.05x = 31,979.46
  5. Step 5: Solve for x
    x = 31,979.46/167.05
  6. Step 6: Final answer
    x = 191.44

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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.