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Finding the Fourth Proportional to 94.78, 131.48 and 89.92

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Solution

The fourth proportional to 94.78, 131.48 and 89.92 is: 124.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.78 : 131.48 = 89.92 : x
  2. Step 2: Convert to fraction form
    94.78/131.48 = 89.92/x
  3. Step 3: Cross multiply
    94.78x = 131.48 × 89.92
  4. Step 4: Simplify right side
    94.78x = 11,822.68
  5. Step 5: Solve for x
    x = 11,822.68/94.78
  6. Step 6: Final answer
    x = 124.74

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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.