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Finding the Fourth Proportional to 134.24, 184.97 and 99.21

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Solution

The fourth proportional to 134.24, 184.97 and 99.21 is: 136.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.24 : 184.97 = 99.21 : x
  2. Step 2: Convert to fraction form
    134.24/184.97 = 99.21/x
  3. Step 3: Cross multiply
    134.24x = 184.97 × 99.21
  4. Step 4: Simplify right side
    134.24x = 18,350.38
  5. Step 5: Solve for x
    x = 18,350.38/134.24
  6. Step 6: Final answer
    x = 136.70

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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.