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Finding the Fourth Proportional to 88.92, 121.92 and 87.96

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Solution

The fourth proportional to 88.92, 121.92 and 87.96 is: 120.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.92 : 121.92 = 87.96 : x
  2. Step 2: Convert to fraction form
    88.92/121.92 = 87.96/x
  3. Step 3: Cross multiply
    88.92x = 121.92 × 87.96
  4. Step 4: Simplify right side
    88.92x = 10,724.08
  5. Step 5: Solve for x
    x = 10,724.08/88.92
  6. Step 6: Final answer
    x = 120.60

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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.