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Finding the Fourth Proportional to 165.87, 228.87 and 100.33

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Solution

The fourth proportional to 165.87, 228.87 and 100.33 is: 138.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.87 : 228.87 = 100.33 : x
  2. Step 2: Convert to fraction form
    165.87/228.87 = 100.33/x
  3. Step 3: Cross multiply
    165.87x = 228.87 × 100.33
  4. Step 4: Simplify right side
    165.87x = 22,961.95
  5. Step 5: Solve for x
    x = 22,961.95/165.87
  6. Step 6: Final answer
    x = 138.43

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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.