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Finding the Fourth Proportional to 165.10, 247.78 and 73.86

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Solution

The fourth proportional to 165.10, 247.78 and 73.86 is: 110.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.10 : 247.78 = 73.86 : x
  2. Step 2: Convert to fraction form
    165.10/247.78 = 73.86/x
  3. Step 3: Cross multiply
    165.10x = 247.78 × 73.86
  4. Step 4: Simplify right side
    165.10x = 18,301.03
  5. Step 5: Solve for x
    x = 18,301.03/165.10
  6. Step 6: Final answer
    x = 110.85

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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.