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Finding the Fourth Proportional to 164.80, 247.04 and 103.92

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Solution

The fourth proportional to 164.80, 247.04 and 103.92 is: 155.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.80 : 247.04 = 103.92 : x
  2. Step 2: Convert to fraction form
    164.80/247.04 = 103.92/x
  3. Step 3: Cross multiply
    164.80x = 247.04 × 103.92
  4. Step 4: Simplify right side
    164.80x = 25,672.40
  5. Step 5: Solve for x
    x = 25,672.40/164.80
  6. Step 6: Final answer
    x = 155.78

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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.