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Finding the Fourth Proportional to 96.91, 133.74 and 55.47

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Solution

The fourth proportional to 96.91, 133.74 and 55.47 is: 76.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.91 : 133.74 = 55.47 : x
  2. Step 2: Convert to fraction form
    96.91/133.74 = 55.47/x
  3. Step 3: Cross multiply
    96.91x = 133.74 × 55.47
  4. Step 4: Simplify right side
    96.91x = 7,418.56
  5. Step 5: Solve for x
    x = 7,418.56/96.91
  6. Step 6: Final answer
    x = 76.55

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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.