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Finding the Fourth Proportional to 82.96, 124.41 and 71.38

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Solution

The fourth proportional to 82.96, 124.41 and 71.38 is: 107.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.96 : 124.41 = 71.38 : x
  2. Step 2: Convert to fraction form
    82.96/124.41 = 71.38/x
  3. Step 3: Cross multiply
    82.96x = 124.41 × 71.38
  4. Step 4: Simplify right side
    82.96x = 8,880.39
  5. Step 5: Solve for x
    x = 8,880.39/82.96
  6. Step 6: Final answer
    x = 107.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.