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Finding the Fourth Proportional to 137.90, 189.93 and 119.48

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Solution

The fourth proportional to 137.90, 189.93 and 119.48 is: 164.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.90 : 189.93 = 119.48 : x
  2. Step 2: Convert to fraction form
    137.90/189.93 = 119.48/x
  3. Step 3: Cross multiply
    137.90x = 189.93 × 119.48
  4. Step 4: Simplify right side
    137.90x = 22,691.89
  5. Step 5: Solve for x
    x = 22,691.89/137.90
  6. Step 6: Final answer
    x = 164.56

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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.