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Finding the Fourth Proportional to 169.20, 234.51 and 153

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Solution

The fourth proportional to 169.20, 234.51 and 153 is: 212.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.20 : 234.51 = 153 : x
  2. Step 2: Convert to fraction form
    169.20/234.51 = 153/x
  3. Step 3: Cross multiply
    169.20x = 234.51 × 153
  4. Step 4: Simplify right side
    169.20x = 35,880.03
  5. Step 5: Solve for x
    x = 35,880.03/169.20
  6. Step 6: Final answer
    x = 212.06

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.