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Finding the Fourth Proportional to 94.96, 131.07 and 65.85

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Solution

The fourth proportional to 94.96, 131.07 and 65.85 is: 90.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.96 : 131.07 = 65.85 : x
  2. Step 2: Convert to fraction form
    94.96/131.07 = 65.85/x
  3. Step 3: Cross multiply
    94.96x = 131.07 × 65.85
  4. Step 4: Simplify right side
    94.96x = 8,630.96
  5. Step 5: Solve for x
    x = 8,630.96/94.96
  6. Step 6: Final answer
    x = 90.89

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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.