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Finding the Fourth Proportional to 165.90, 248.96 and 68.48

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Solution

The fourth proportional to 165.90, 248.96 and 68.48 is: 102.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.90 : 248.96 = 68.48 : x
  2. Step 2: Convert to fraction form
    165.90/248.96 = 68.48/x
  3. Step 3: Cross multiply
    165.90x = 248.96 × 68.48
  4. Step 4: Simplify right side
    165.90x = 17,048.78
  5. Step 5: Solve for x
    x = 17,048.78/165.90
  6. Step 6: Final answer
    x = 102.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.