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Finding the Fourth Proportional to 80.88, 121.34 and 23.10

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Solution

The fourth proportional to 80.88, 121.34 and 23.10 is: 34.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.88 : 121.34 = 23.10 : x
  2. Step 2: Convert to fraction form
    80.88/121.34 = 23.10/x
  3. Step 3: Cross multiply
    80.88x = 121.34 × 23.10
  4. Step 4: Simplify right side
    80.88x = 2,802.84
  5. Step 5: Solve for x
    x = 2,802.84/80.88
  6. Step 6: Final answer
    x = 34.65

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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.