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Finding the Fourth Proportional to 88.87, 122.66 and 80.21

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Solution

The fourth proportional to 88.87, 122.66 and 80.21 is: 110.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.87 : 122.66 = 80.21 : x
  2. Step 2: Convert to fraction form
    88.87/122.66 = 80.21/x
  3. Step 3: Cross multiply
    88.87x = 122.66 × 80.21
  4. Step 4: Simplify right side
    88.87x = 9,838.28
  5. Step 5: Solve for x
    x = 9,838.28/88.87
  6. Step 6: Final answer
    x = 110.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.