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Finding the Fourth Proportional to 134.38, 185.30 and 109.74

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Solution

The fourth proportional to 134.38, 185.30 and 109.74 is: 151.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.38 : 185.30 = 109.74 : x
  2. Step 2: Convert to fraction form
    134.38/185.30 = 109.74/x
  3. Step 3: Cross multiply
    134.38x = 185.30 × 109.74
  4. Step 4: Simplify right side
    134.38x = 20,334.82
  5. Step 5: Solve for x
    x = 20,334.82/134.38
  6. Step 6: Final answer
    x = 151.32

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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.