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Finding the Fourth Proportional to 95.94, 131.74 and 81.36

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Solution

The fourth proportional to 95.94, 131.74 and 81.36 is: 111.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.94 : 131.74 = 81.36 : x
  2. Step 2: Convert to fraction form
    95.94/131.74 = 81.36/x
  3. Step 3: Cross multiply
    95.94x = 131.74 × 81.36
  4. Step 4: Simplify right side
    95.94x = 10,718.16
  5. Step 5: Solve for x
    x = 10,718.16/95.94
  6. Step 6: Final answer
    x = 111.72

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.