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Finding the Fourth Proportional to 163.36, 244.72 and 115.36

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Solution

The fourth proportional to 163.36, 244.72 and 115.36 is: 172.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.36 : 244.72 = 115.36 : x
  2. Step 2: Convert to fraction form
    163.36/244.72 = 115.36/x
  3. Step 3: Cross multiply
    163.36x = 244.72 × 115.36
  4. Step 4: Simplify right side
    163.36x = 28,230.90
  5. Step 5: Solve for x
    x = 28,230.90/163.36
  6. Step 6: Final answer
    x = 172.81

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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.