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Finding the Fourth Proportional to 88.11, 120.71 and 84.87

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Solution

The fourth proportional to 88.11, 120.71 and 84.87 is: 116.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.11 : 120.71 = 84.87 : x
  2. Step 2: Convert to fraction form
    88.11/120.71 = 84.87/x
  3. Step 3: Cross multiply
    88.11x = 120.71 × 84.87
  4. Step 4: Simplify right side
    88.11x = 10,244.87
  5. Step 5: Solve for x
    x = 10,244.87/88.11
  6. Step 6: Final answer
    x = 116.27

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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.