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Finding the Fourth Proportional to 88.79, 132.89 and 71.55

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Solution

The fourth proportional to 88.79, 132.89 and 71.55 is: 107.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.79 : 132.89 = 71.55 : x
  2. Step 2: Convert to fraction form
    88.79/132.89 = 71.55/x
  3. Step 3: Cross multiply
    88.79x = 132.89 × 71.55
  4. Step 4: Simplify right side
    88.79x = 9,508.28
  5. Step 5: Solve for x
    x = 9,508.28/88.79
  6. Step 6: Final answer
    x = 107.09

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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.