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Finding the Fourth Proportional to 134.22, 185.11 and 90.48

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Solution

The fourth proportional to 134.22, 185.11 and 90.48 is: 124.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.22 : 185.11 = 90.48 : x
  2. Step 2: Convert to fraction form
    134.22/185.11 = 90.48/x
  3. Step 3: Cross multiply
    134.22x = 185.11 × 90.48
  4. Step 4: Simplify right side
    134.22x = 16,748.53
  5. Step 5: Solve for x
    x = 16,748.53/134.22
  6. Step 6: Final answer
    x = 124.78

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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.