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Finding the Fourth Proportional to 132.75, 183 and 91.23

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Solution

The fourth proportional to 132.75, 183 and 91.23 is: 125.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.75 : 183 = 91.23 : x
  2. Step 2: Convert to fraction form
    132.75/183 = 91.23/x
  3. Step 3: Cross multiply
    132.75x = 183 × 91.23
  4. Step 4: Simplify right side
    132.75x = 16,695.09
  5. Step 5: Solve for x
    x = 16,695.09/132.75
  6. Step 6: Final answer
    x = 125.77

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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.