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Finding the Fourth Proportional to 88.96, 121.91 and 80.32

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Solution

The fourth proportional to 88.96, 121.91 and 80.32 is: 110.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.96 : 121.91 = 80.32 : x
  2. Step 2: Convert to fraction form
    88.96/121.91 = 80.32/x
  3. Step 3: Cross multiply
    88.96x = 121.91 × 80.32
  4. Step 4: Simplify right side
    88.96x = 9,791.81
  5. Step 5: Solve for x
    x = 9,791.81/88.96
  6. Step 6: Final answer
    x = 110.07

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.