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Finding the Fourth Proportional to 83.22, 114.79 and 72.29

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Solution

The fourth proportional to 83.22, 114.79 and 72.29 is: 99.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.22 : 114.79 = 72.29 : x
  2. Step 2: Convert to fraction form
    83.22/114.79 = 72.29/x
  3. Step 3: Cross multiply
    83.22x = 114.79 × 72.29
  4. Step 4: Simplify right side
    83.22x = 8,297.41
  5. Step 5: Solve for x
    x = 8,297.41/83.22
  6. Step 6: Final answer
    x = 99.70

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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.