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Finding the Fourth Proportional to 162.21, 241.86 and 136.68

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Solution

The fourth proportional to 162.21, 241.86 and 136.68 is: 203.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.21 : 241.86 = 136.68 : x
  2. Step 2: Convert to fraction form
    162.21/241.86 = 136.68/x
  3. Step 3: Cross multiply
    162.21x = 241.86 × 136.68
  4. Step 4: Simplify right side
    162.21x = 33,057.42
  5. Step 5: Solve for x
    x = 33,057.42/162.21
  6. Step 6: Final answer
    x = 203.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.