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Finding the Fourth Proportional to 161.68, 222.92 and 135.76

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Solution

The fourth proportional to 161.68, 222.92 and 135.76 is: 187.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.68 : 222.92 = 135.76 : x
  2. Step 2: Convert to fraction form
    161.68/222.92 = 135.76/x
  3. Step 3: Cross multiply
    161.68x = 222.92 × 135.76
  4. Step 4: Simplify right side
    161.68x = 30,263.62
  5. Step 5: Solve for x
    x = 30,263.62/161.68
  6. Step 6: Final answer
    x = 187.18

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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.