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Finding the Fourth Proportional to 86.97, 119.68 and 86.44

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Solution

The fourth proportional to 86.97, 119.68 and 86.44 is: 118.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86.97 : 119.68 = 86.44 : x
  2. Step 2: Convert to fraction form
    86.97/119.68 = 86.44/x
  3. Step 3: Cross multiply
    86.97x = 119.68 × 86.44
  4. Step 4: Simplify right side
    86.97x = 10,345.14
  5. Step 5: Solve for x
    x = 10,345.14/86.97
  6. Step 6: Final answer
    x = 118.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.