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Finding the Fourth Proportional to 163.81, 245.46 and 82.54

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Solution

The fourth proportional to 163.81, 245.46 and 82.54 is: 123.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.81 : 245.46 = 82.54 : x
  2. Step 2: Convert to fraction form
    163.81/245.46 = 82.54/x
  3. Step 3: Cross multiply
    163.81x = 245.46 × 82.54
  4. Step 4: Simplify right side
    163.81x = 20,260.27
  5. Step 5: Solve for x
    x = 20,260.27/163.81
  6. Step 6: Final answer
    x = 123.68

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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.