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Finding the Fourth Proportional to 96.08, 131.78 and 90.82

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Solution

The fourth proportional to 96.08, 131.78 and 90.82 is: 124.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.08 : 131.78 = 90.82 : x
  2. Step 2: Convert to fraction form
    96.08/131.78 = 90.82/x
  3. Step 3: Cross multiply
    96.08x = 131.78 × 90.82
  4. Step 4: Simplify right side
    96.08x = 11,968.26
  5. Step 5: Solve for x
    x = 11,968.26/96.08
  6. Step 6: Final answer
    x = 124.57

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.