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Finding the Fourth Proportional to 165.10, 247.67 and 67.60

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Solution

The fourth proportional to 165.10, 247.67 and 67.60 is: 101.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.10 : 247.67 = 67.60 : x
  2. Step 2: Convert to fraction form
    165.10/247.67 = 67.60/x
  3. Step 3: Cross multiply
    165.10x = 247.67 × 67.60
  4. Step 4: Simplify right side
    165.10x = 16,740.92
  5. Step 5: Solve for x
    x = 16,740.92/165.10
  6. Step 6: Final answer
    x = 101.40

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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.