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Finding the Fourth Proportional to 165.79, 247.75 and 135.39

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Solution

The fourth proportional to 165.79, 247.75 and 135.39 is: 202.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.79 : 247.75 = 135.39 : x
  2. Step 2: Convert to fraction form
    165.79/247.75 = 135.39/x
  3. Step 3: Cross multiply
    165.79x = 247.75 × 135.39
  4. Step 4: Simplify right side
    165.79x = 33,542.87
  5. Step 5: Solve for x
    x = 33,542.87/165.79
  6. Step 6: Final answer
    x = 202.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.