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Finding the Fourth Proportional to 89.03, 122.55 and 67.16

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Solution

The fourth proportional to 89.03, 122.55 and 67.16 is: 92.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.03 : 122.55 = 67.16 : x
  2. Step 2: Convert to fraction form
    89.03/122.55 = 67.16/x
  3. Step 3: Cross multiply
    89.03x = 122.55 × 67.16
  4. Step 4: Simplify right side
    89.03x = 8,229.85
  5. Step 5: Solve for x
    x = 8,229.85/89.03
  6. Step 6: Final answer
    x = 92.44

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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.