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Finding the Fourth Proportional to 163.58, 226.21 and 137.67

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Solution

The fourth proportional to 163.58, 226.21 and 137.67 is: 190.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.58 : 226.21 = 137.67 : x
  2. Step 2: Convert to fraction form
    163.58/226.21 = 137.67/x
  3. Step 3: Cross multiply
    163.58x = 226.21 × 137.67
  4. Step 4: Simplify right side
    163.58x = 31,142.72
  5. Step 5: Solve for x
    x = 31,142.72/163.58
  6. Step 6: Final answer
    x = 190.38

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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.