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Finding the Fourth Proportional to 94.56, 131.12 and 92.80

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Solution

The fourth proportional to 94.56, 131.12 and 92.80 is: 128.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.56 : 131.12 = 92.80 : x
  2. Step 2: Convert to fraction form
    94.56/131.12 = 92.80/x
  3. Step 3: Cross multiply
    94.56x = 131.12 × 92.80
  4. Step 4: Simplify right side
    94.56x = 12,167.94
  5. Step 5: Solve for x
    x = 12,167.94/94.56
  6. Step 6: Final answer
    x = 128.68

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.