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Finding the Fourth Proportional to 165.28, 247.96 and 69.10

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Solution

The fourth proportional to 165.28, 247.96 and 69.10 is: 103.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.28 : 247.96 = 69.10 : x
  2. Step 2: Convert to fraction form
    165.28/247.96 = 69.10/x
  3. Step 3: Cross multiply
    165.28x = 247.96 × 69.10
  4. Step 4: Simplify right side
    165.28x = 17,134.04
  5. Step 5: Solve for x
    x = 17,134.04/165.28
  6. Step 6: Final answer
    x = 103.67

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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.