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Finding the Fourth Proportional to 88.17, 132.86 and 84.12

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Solution

The fourth proportional to 88.17, 132.86 and 84.12 is: 126.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.17 : 132.86 = 84.12 : x
  2. Step 2: Convert to fraction form
    88.17/132.86 = 84.12/x
  3. Step 3: Cross multiply
    88.17x = 132.86 × 84.12
  4. Step 4: Simplify right side
    88.17x = 11,175.10
  5. Step 5: Solve for x
    x = 11,175.10/88.17
  6. Step 6: Final answer
    x = 126.75

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.