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Finding the Fourth Proportional to 81.03, 121.55 and 24.03

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Solution

The fourth proportional to 81.03, 121.55 and 24.03 is: 36.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81.03 : 121.55 = 24.03 : x
  2. Step 2: Convert to fraction form
    81.03/121.55 = 24.03/x
  3. Step 3: Cross multiply
    81.03x = 121.55 × 24.03
  4. Step 4: Simplify right side
    81.03x = 2,921.09
  5. Step 5: Solve for x
    x = 2,921.09/81.03
  6. Step 6: Final answer
    x = 36.05

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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.