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Finding the Fourth Proportional to 150.98, 208.71 and 120.20

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Solution

The fourth proportional to 150.98, 208.71 and 120.20 is: 166.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.98 : 208.71 = 120.20 : x
  2. Step 2: Convert to fraction form
    150.98/208.71 = 120.20/x
  3. Step 3: Cross multiply
    150.98x = 208.71 × 120.20
  4. Step 4: Simplify right side
    150.98x = 25,085.90
  5. Step 5: Solve for x
    x = 25,085.90/150.98
  6. Step 6: Final answer
    x = 166.16

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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.