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Finding the Fourth Proportional to 88.76, 132.82 and 86.16

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Solution

The fourth proportional to 88.76, 132.82 and 86.16 is: 128.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.76 : 132.82 = 86.16 : x
  2. Step 2: Convert to fraction form
    88.76/132.82 = 86.16/x
  3. Step 3: Cross multiply
    88.76x = 132.82 × 86.16
  4. Step 4: Simplify right side
    88.76x = 11,444.05
  5. Step 5: Solve for x
    x = 11,444.05/88.76
  6. Step 6: Final answer
    x = 128.93

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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.