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Finding the Fourth Proportional to 119.80, 180.43 and 99.82

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Solution

The fourth proportional to 119.80, 180.43 and 99.82 is: 150.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.80 : 180.43 = 99.82 : x
  2. Step 2: Convert to fraction form
    119.80/180.43 = 99.82/x
  3. Step 3: Cross multiply
    119.80x = 180.43 × 99.82
  4. Step 4: Simplify right side
    119.80x = 18,010.52
  5. Step 5: Solve for x
    x = 18,010.52/119.80
  6. Step 6: Final answer
    x = 150.34

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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.