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Finding the Fourth Proportional to 151, 208.30 and 114.21

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Solution

The fourth proportional to 151, 208.30 and 114.21 is: 157.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    151 : 208.30 = 114.21 : x
  2. Step 2: Convert to fraction form
    151/208.30 = 114.21/x
  3. Step 3: Cross multiply
    151x = 208.30 × 114.21
  4. Step 4: Simplify right side
    151x = 23,789.94
  5. Step 5: Solve for x
    x = 23,789.94/151
  6. Step 6: Final answer
    x = 157.55

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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.