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Finding the Fourth Proportional to 88.32, 132.45 and 61.28

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Solution

The fourth proportional to 88.32, 132.45 and 61.28 is: 91.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.32 : 132.45 = 61.28 : x
  2. Step 2: Convert to fraction form
    88.32/132.45 = 61.28/x
  3. Step 3: Cross multiply
    88.32x = 132.45 × 61.28
  4. Step 4: Simplify right side
    88.32x = 8,116.54
  5. Step 5: Solve for x
    x = 8,116.54/88.32
  6. Step 6: Final answer
    x = 91.90

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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.