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Finding the Fourth Proportional to 88.21, 132.18 and 76.33

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Solution

The fourth proportional to 88.21, 132.18 and 76.33 is: 114.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.21 : 132.18 = 76.33 : x
  2. Step 2: Convert to fraction form
    88.21/132.18 = 76.33/x
  3. Step 3: Cross multiply
    88.21x = 132.18 × 76.33
  4. Step 4: Simplify right side
    88.21x = 10,089.30
  5. Step 5: Solve for x
    x = 10,089.30/88.21
  6. Step 6: Final answer
    x = 114.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.