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Finding the Fourth Proportional to 161.90, 242.96 and 153.84

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Solution

The fourth proportional to 161.90, 242.96 and 153.84 is: 230.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.90 : 242.96 = 153.84 : x
  2. Step 2: Convert to fraction form
    161.90/242.96 = 153.84/x
  3. Step 3: Cross multiply
    161.90x = 242.96 × 153.84
  4. Step 4: Simplify right side
    161.90x = 37,376.97
  5. Step 5: Solve for x
    x = 37,376.97/161.90
  6. Step 6: Final answer
    x = 230.86

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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.