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Finding the Fourth Proportional to 82.83, 114.79 and 81.84

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Solution

The fourth proportional to 82.83, 114.79 and 81.84 is: 113.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.83 : 114.79 = 81.84 : x
  2. Step 2: Convert to fraction form
    82.83/114.79 = 81.84/x
  3. Step 3: Cross multiply
    82.83x = 114.79 × 81.84
  4. Step 4: Simplify right side
    82.83x = 9,394.21
  5. Step 5: Solve for x
    x = 9,394.21/82.83
  6. Step 6: Final answer
    x = 113.42

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.