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Finding the Fourth Proportional to 88.36, 122.43 and 86.44

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Solution

The fourth proportional to 88.36, 122.43 and 86.44 is: 119.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.36 : 122.43 = 86.44 : x
  2. Step 2: Convert to fraction form
    88.36/122.43 = 86.44/x
  3. Step 3: Cross multiply
    88.36x = 122.43 × 86.44
  4. Step 4: Simplify right side
    88.36x = 10,582.85
  5. Step 5: Solve for x
    x = 10,582.85/88.36
  6. Step 6: Final answer
    x = 119.77

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.