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Finding the Fourth Proportional to 121.22, 182.66 and 100.03

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Solution

The fourth proportional to 121.22, 182.66 and 100.03 is: 150.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.22 : 182.66 = 100.03 : x
  2. Step 2: Convert to fraction form
    121.22/182.66 = 100.03/x
  3. Step 3: Cross multiply
    121.22x = 182.66 × 100.03
  4. Step 4: Simplify right side
    121.22x = 18,270.52
  5. Step 5: Solve for x
    x = 18,270.52/121.22
  6. Step 6: Final answer
    x = 150.72

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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.