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Finding the Fourth Proportional to 121.32, 166.48 and 110.32

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Solution

The fourth proportional to 121.32, 166.48 and 110.32 is: 151.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.32 : 166.48 = 110.32 : x
  2. Step 2: Convert to fraction form
    121.32/166.48 = 110.32/x
  3. Step 3: Cross multiply
    121.32x = 166.48 × 110.32
  4. Step 4: Simplify right side
    121.32x = 18,366.07
  5. Step 5: Solve for x
    x = 18,366.07/121.32
  6. Step 6: Final answer
    x = 151.39

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.