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Finding the Fourth Proportional to 82.84, 124.35 and 81.67

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Solution

The fourth proportional to 82.84, 124.35 and 81.67 is: 122.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.84 : 124.35 = 81.67 : x
  2. Step 2: Convert to fraction form
    82.84/124.35 = 81.67/x
  3. Step 3: Cross multiply
    82.84x = 124.35 × 81.67
  4. Step 4: Simplify right side
    82.84x = 10,155.66
  5. Step 5: Solve for x
    x = 10,155.66/82.84
  6. Step 6: Final answer
    x = 122.59

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