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Finding the Fourth Proportional to 151.20, 208.67 and 114.28

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Solution

The fourth proportional to 151.20, 208.67 and 114.28 is: 157.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.20 : 208.67 = 114.28 : x
  2. Step 2: Convert to fraction form
    151.20/208.67 = 114.28/x
  3. Step 3: Cross multiply
    151.20x = 208.67 × 114.28
  4. Step 4: Simplify right side
    151.20x = 23,845.71
  5. Step 5: Solve for x
    x = 23,845.71/151.20
  6. Step 6: Final answer
    x = 157.71

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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.