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Finding the Fourth Proportional to 88.24, 132.18 and 72.88

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Solution

The fourth proportional to 88.24, 132.18 and 72.88 is: 109.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.24 : 132.18 = 72.88 : x
  2. Step 2: Convert to fraction form
    88.24/132.18 = 72.88/x
  3. Step 3: Cross multiply
    88.24x = 132.18 × 72.88
  4. Step 4: Simplify right side
    88.24x = 9,633.28
  5. Step 5: Solve for x
    x = 9,633.28/88.24
  6. Step 6: Final answer
    x = 109.17

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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.