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Finding the Fourth Proportional to 165.60, 248.30 and 84.60

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Solution

The fourth proportional to 165.60, 248.30 and 84.60 is: 126.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.60 : 248.30 = 84.60 : x
  2. Step 2: Convert to fraction form
    165.60/248.30 = 84.60/x
  3. Step 3: Cross multiply
    165.60x = 248.30 × 84.60
  4. Step 4: Simplify right side
    165.60x = 21,006.18
  5. Step 5: Solve for x
    x = 21,006.18/165.60
  6. Step 6: Final answer
    x = 126.85

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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.