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Finding the Fourth Proportional to 120.60, 165.60 and 120.12

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Solution

The fourth proportional to 120.60, 165.60 and 120.12 is: 164.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.60 : 165.60 = 120.12 : x
  2. Step 2: Convert to fraction form
    120.60/165.60 = 120.12/x
  3. Step 3: Cross multiply
    120.60x = 165.60 × 120.12
  4. Step 4: Simplify right side
    120.60x = 19,891.87
  5. Step 5: Solve for x
    x = 19,891.87/120.60
  6. Step 6: Final answer
    x = 164.94

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.