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Finding the Fourth Proportional to 94.94, 131.57 and 93.78

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Solution

The fourth proportional to 94.94, 131.57 and 93.78 is: 129.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.94 : 131.57 = 93.78 : x
  2. Step 2: Convert to fraction form
    94.94/131.57 = 93.78/x
  3. Step 3: Cross multiply
    94.94x = 131.57 × 93.78
  4. Step 4: Simplify right side
    94.94x = 12,338.63
  5. Step 5: Solve for x
    x = 12,338.63/94.94
  6. Step 6: Final answer
    x = 129.96

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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.