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Finding the Fourth Proportional to 161.94, 242.82 and 159.78

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Solution

The fourth proportional to 161.94, 242.82 and 159.78 is: 239.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.94 : 242.82 = 159.78 : x
  2. Step 2: Convert to fraction form
    161.94/242.82 = 159.78/x
  3. Step 3: Cross multiply
    161.94x = 242.82 × 159.78
  4. Step 4: Simplify right side
    161.94x = 38,797.78
  5. Step 5: Solve for x
    x = 38,797.78/161.94
  6. Step 6: Final answer
    x = 239.58

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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.