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Finding the Fourth Proportional to 165.33, 228.38 and 137.79

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Solution

The fourth proportional to 165.33, 228.38 and 137.79 is: 190.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.33 : 228.38 = 137.79 : x
  2. Step 2: Convert to fraction form
    165.33/228.38 = 137.79/x
  3. Step 3: Cross multiply
    165.33x = 228.38 × 137.79
  4. Step 4: Simplify right side
    165.33x = 31,467.79
  5. Step 5: Solve for x
    x = 31,467.79/165.33
  6. Step 6: Final answer
    x = 190.33

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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.