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Finding the Fourth Proportional to 161.55, 241.72 and 89.46

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Solution

The fourth proportional to 161.55, 241.72 and 89.46 is: 133.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.55 : 241.72 = 89.46 : x
  2. Step 2: Convert to fraction form
    161.55/241.72 = 89.46/x
  3. Step 3: Cross multiply
    161.55x = 241.72 × 89.46
  4. Step 4: Simplify right side
    161.55x = 21,624.05
  5. Step 5: Solve for x
    x = 21,624.05/161.55
  6. Step 6: Final answer
    x = 133.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.