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Finding the Fourth Proportional to 165.73, 228.55 and 103.54

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Solution

The fourth proportional to 165.73, 228.55 and 103.54 is: 142.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.73 : 228.55 = 103.54 : x
  2. Step 2: Convert to fraction form
    165.73/228.55 = 103.54/x
  3. Step 3: Cross multiply
    165.73x = 228.55 × 103.54
  4. Step 4: Simplify right side
    165.73x = 23,662.67
  5. Step 5: Solve for x
    x = 23,662.67/165.73
  6. Step 6: Final answer
    x = 142.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.