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Finding the Fourth Proportional to 120.71, 180.79 and 110.32

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Solution

The fourth proportional to 120.71, 180.79 and 110.32 is: 165.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.71 : 180.79 = 110.32 : x
  2. Step 2: Convert to fraction form
    120.71/180.79 = 110.32/x
  3. Step 3: Cross multiply
    120.71x = 180.79 × 110.32
  4. Step 4: Simplify right side
    120.71x = 19,944.03
  5. Step 5: Solve for x
    x = 19,944.03/120.71
  6. Step 6: Final answer
    x = 165.22

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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.