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Finding the Fourth Proportional to 161.46, 240.89 and 142.02

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Solution

The fourth proportional to 161.46, 240.89 and 142.02 is: 211.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.46 : 240.89 = 142.02 : x
  2. Step 2: Convert to fraction form
    161.46/240.89 = 142.02/x
  3. Step 3: Cross multiply
    161.46x = 240.89 × 142.02
  4. Step 4: Simplify right side
    161.46x = 34,210.49
  5. Step 5: Solve for x
    x = 34,210.49/161.46
  6. Step 6: Final answer
    x = 211.88

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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.