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Finding the Fourth Proportional to 163.72, 245.68 and 82.56

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Solution

The fourth proportional to 163.72, 245.68 and 82.56 is: 123.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.72 : 245.68 = 82.56 : x
  2. Step 2: Convert to fraction form
    163.72/245.68 = 82.56/x
  3. Step 3: Cross multiply
    163.72x = 245.68 × 82.56
  4. Step 4: Simplify right side
    163.72x = 20,283.34
  5. Step 5: Solve for x
    x = 20,283.34/163.72
  6. Step 6: Final answer
    x = 123.89

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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.