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Finding the Fourth Proportional to 120.88, 182.04 and 103.92

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Solution

The fourth proportional to 120.88, 182.04 and 103.92 is: 156.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.88 : 182.04 = 103.92 : x
  2. Step 2: Convert to fraction form
    120.88/182.04 = 103.92/x
  3. Step 3: Cross multiply
    120.88x = 182.04 × 103.92
  4. Step 4: Simplify right side
    120.88x = 18,917.60
  5. Step 5: Solve for x
    x = 18,917.60/120.88
  6. Step 6: Final answer
    x = 156.50

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.