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Finding the Fourth Proportional to 165.95, 229.05 and 103.75

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Solution

The fourth proportional to 165.95, 229.05 and 103.75 is: 143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.95 : 229.05 = 103.75 : x
  2. Step 2: Convert to fraction form
    165.95/229.05 = 103.75/x
  3. Step 3: Cross multiply
    165.95x = 229.05 × 103.75
  4. Step 4: Simplify right side
    165.95x = 23,763.94
  5. Step 5: Solve for x
    x = 23,763.94/165.95
  6. Step 6: Final answer
    x = 143.20

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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.