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Finding the Fourth Proportional to 84.01, 126.68 and 82.59

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Solution

The fourth proportional to 84.01, 126.68 and 82.59 is: 124.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.01 : 126.68 = 82.59 : x
  2. Step 2: Convert to fraction form
    84.01/126.68 = 82.59/x
  3. Step 3: Cross multiply
    84.01x = 126.68 × 82.59
  4. Step 4: Simplify right side
    84.01x = 10,462.50
  5. Step 5: Solve for x
    x = 10,462.50/84.01
  6. Step 6: Final answer
    x = 124.54

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.