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Finding the Fourth Proportional to 165.77, 248.48 and 68.25

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Solution

The fourth proportional to 165.77, 248.48 and 68.25 is: 102.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.77 : 248.48 = 68.25 : x
  2. Step 2: Convert to fraction form
    165.77/248.48 = 68.25/x
  3. Step 3: Cross multiply
    165.77x = 248.48 × 68.25
  4. Step 4: Simplify right side
    165.77x = 16,958.76
  5. Step 5: Solve for x
    x = 16,958.76/165.77
  6. Step 6: Final answer
    x = 102.30

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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.