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Finding the Fourth Proportional to 134.39, 185.44 and 99.43

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Solution

The fourth proportional to 134.39, 185.44 and 99.43 is: 137.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.39 : 185.44 = 99.43 : x
  2. Step 2: Convert to fraction form
    134.39/185.44 = 99.43/x
  3. Step 3: Cross multiply
    134.39x = 185.44 × 99.43
  4. Step 4: Simplify right side
    134.39x = 18,438.30
  5. Step 5: Solve for x
    x = 18,438.30/134.39
  6. Step 6: Final answer
    x = 137.20

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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.