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Finding the Fourth Proportional to 161.23, 241.36 and 120.55

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Solution

The fourth proportional to 161.23, 241.36 and 120.55 is: 180.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.23 : 241.36 = 120.55 : x
  2. Step 2: Convert to fraction form
    161.23/241.36 = 120.55/x
  3. Step 3: Cross multiply
    161.23x = 241.36 × 120.55
  4. Step 4: Simplify right side
    161.23x = 29,095.95
  5. Step 5: Solve for x
    x = 29,095.95/161.23
  6. Step 6: Final answer
    x = 180.46

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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.