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Finding the Fourth Proportional to 163.72, 225.93 and 98.20

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Solution

The fourth proportional to 163.72, 225.93 and 98.20 is: 135.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.72 : 225.93 = 98.20 : x
  2. Step 2: Convert to fraction form
    163.72/225.93 = 98.20/x
  3. Step 3: Cross multiply
    163.72x = 225.93 × 98.20
  4. Step 4: Simplify right side
    163.72x = 22,186.33
  5. Step 5: Solve for x
    x = 22,186.33/163.72
  6. Step 6: Final answer
    x = 135.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.