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Finding the Fourth Proportional to 161.54, 241.20 and 143.36

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Solution

The fourth proportional to 161.54, 241.20 and 143.36 is: 214.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.54 : 241.20 = 143.36 : x
  2. Step 2: Convert to fraction form
    161.54/241.20 = 143.36/x
  3. Step 3: Cross multiply
    161.54x = 241.20 × 143.36
  4. Step 4: Simplify right side
    161.54x = 34,577.72
  5. Step 5: Solve for x
    x = 34,577.72/161.54
  6. Step 6: Final answer
    x = 214.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.