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Finding the Fourth Proportional to 142.97, 197.39 and 106.09

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Solution

The fourth proportional to 142.97, 197.39 and 106.09 is: 146.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.97 : 197.39 = 106.09 : x
  2. Step 2: Convert to fraction form
    142.97/197.39 = 106.09/x
  3. Step 3: Cross multiply
    142.97x = 197.39 × 106.09
  4. Step 4: Simplify right side
    142.97x = 20,940.88
  5. Step 5: Solve for x
    x = 20,940.88/142.97
  6. Step 6: Final answer
    x = 146.47

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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.