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Finding the Fourth Proportional to 161.55, 240.97 and 143.32

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Solution

The fourth proportional to 161.55, 240.97 and 143.32 is: 213.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.55 : 240.97 = 143.32 : x
  2. Step 2: Convert to fraction form
    161.55/240.97 = 143.32/x
  3. Step 3: Cross multiply
    161.55x = 240.97 × 143.32
  4. Step 4: Simplify right side
    161.55x = 34,535.82
  5. Step 5: Solve for x
    x = 34,535.82/161.55
  6. Step 6: Final answer
    x = 213.78

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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.