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Finding the Fourth Proportional to 95.64, 131.82 and 66.36

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Solution

The fourth proportional to 95.64, 131.82 and 66.36 is: 91.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.64 : 131.82 = 66.36 : x
  2. Step 2: Convert to fraction form
    95.64/131.82 = 66.36/x
  3. Step 3: Cross multiply
    95.64x = 131.82 × 66.36
  4. Step 4: Simplify right side
    95.64x = 8,747.58
  5. Step 5: Solve for x
    x = 8,747.58/95.64
  6. Step 6: Final answer
    x = 91.46

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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.