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Finding the Fourth Proportional to 161.21, 222.44 and 94.81

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Solution

The fourth proportional to 161.21, 222.44 and 94.81 is: 130.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.21 : 222.44 = 94.81 : x
  2. Step 2: Convert to fraction form
    161.21/222.44 = 94.81/x
  3. Step 3: Cross multiply
    161.21x = 222.44 × 94.81
  4. Step 4: Simplify right side
    161.21x = 21,089.54
  5. Step 5: Solve for x
    x = 21,089.54/161.21
  6. Step 6: Final answer
    x = 130.82

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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.