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Finding the Fourth Proportional to 142.03, 195.97 and 86.83

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Solution

The fourth proportional to 142.03, 195.97 and 86.83 is: 119.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.03 : 195.97 = 86.83 : x
  2. Step 2: Convert to fraction form
    142.03/195.97 = 86.83/x
  3. Step 3: Cross multiply
    142.03x = 195.97 × 86.83
  4. Step 4: Simplify right side
    142.03x = 17,016.08
  5. Step 5: Solve for x
    x = 17,016.08/142.03
  6. Step 6: Final answer
    x = 119.81

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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.