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Finding the Fourth Proportional to 103.22, 141.98 and 83.43

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Solution

The fourth proportional to 103.22, 141.98 and 83.43 is: 114.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.22 : 141.98 = 83.43 : x
  2. Step 2: Convert to fraction form
    103.22/141.98 = 83.43/x
  3. Step 3: Cross multiply
    103.22x = 141.98 × 83.43
  4. Step 4: Simplify right side
    103.22x = 11,844.26
  5. Step 5: Solve for x
    x = 11,844.26/103.22
  6. Step 6: Final answer
    x = 114.75

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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.