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Finding the Fourth Proportional to 121.62, 183.32 and 115.02

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Solution

The fourth proportional to 121.62, 183.32 and 115.02 is: 173.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.62 : 183.32 = 115.02 : x
  2. Step 2: Convert to fraction form
    121.62/183.32 = 115.02/x
  3. Step 3: Cross multiply
    121.62x = 183.32 × 115.02
  4. Step 4: Simplify right side
    121.62x = 21,085.47
  5. Step 5: Solve for x
    x = 21,085.47/121.62
  6. Step 6: Final answer
    x = 173.37

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.