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Finding the Fourth Proportional to 161.46, 222.45 and 135.12

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Solution

The fourth proportional to 161.46, 222.45 and 135.12 is: 186.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.46 : 222.45 = 135.12 : x
  2. Step 2: Convert to fraction form
    161.46/222.45 = 135.12/x
  3. Step 3: Cross multiply
    161.46x = 222.45 × 135.12
  4. Step 4: Simplify right side
    161.46x = 30,057.44
  5. Step 5: Solve for x
    x = 30,057.44/161.46
  6. Step 6: Final answer
    x = 186.16

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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.