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Finding the Fourth Proportional to 119.25, 164.57 and 80.51

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Solution

The fourth proportional to 119.25, 164.57 and 80.51 is: 111.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.25 : 164.57 = 80.51 : x
  2. Step 2: Convert to fraction form
    119.25/164.57 = 80.51/x
  3. Step 3: Cross multiply
    119.25x = 164.57 × 80.51
  4. Step 4: Simplify right side
    119.25x = 13,248.31
  5. Step 5: Solve for x
    x = 13,248.31/119.25
  6. Step 6: Final answer
    x = 111.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.