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Finding the Fourth Proportional to 88.54, 132.91 and 61.40

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Solution

The fourth proportional to 88.54, 132.91 and 61.40 is: 92.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.54 : 132.91 = 61.40 : x
  2. Step 2: Convert to fraction form
    88.54/132.91 = 61.40/x
  3. Step 3: Cross multiply
    88.54x = 132.91 × 61.40
  4. Step 4: Simplify right side
    88.54x = 8,160.85
  5. Step 5: Solve for x
    x = 8,160.85/88.54
  6. Step 6: Final answer
    x = 92.17

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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.