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Finding the Fourth Proportional to 139.37, 191.16 and 135.45

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Solution

The fourth proportional to 139.37, 191.16 and 135.45 is: 185.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.37 : 191.16 = 135.45 : x
  2. Step 2: Convert to fraction form
    139.37/191.16 = 135.45/x
  3. Step 3: Cross multiply
    139.37x = 191.16 × 135.45
  4. Step 4: Simplify right side
    139.37x = 25,892.62
  5. Step 5: Solve for x
    x = 25,892.62/139.37
  6. Step 6: Final answer
    x = 185.79

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.