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Finding the Fourth Proportional to 165.90, 248.53 and 84.48

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Solution

The fourth proportional to 165.90, 248.53 and 84.48 is: 126.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.90 : 248.53 = 84.48 : x
  2. Step 2: Convert to fraction form
    165.90/248.53 = 84.48/x
  3. Step 3: Cross multiply
    165.90x = 248.53 × 84.48
  4. Step 4: Simplify right side
    165.90x = 20,995.81
  5. Step 5: Solve for x
    x = 20,995.81/165.90
  6. Step 6: Final answer
    x = 126.56

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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.