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Finding the Fourth Proportional to 151.01, 208.25 and 103.65

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Solution

The fourth proportional to 151.01, 208.25 and 103.65 is: 142.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.01 : 208.25 = 103.65 : x
  2. Step 2: Convert to fraction form
    151.01/208.25 = 103.65/x
  3. Step 3: Cross multiply
    151.01x = 208.25 × 103.65
  4. Step 4: Simplify right side
    151.01x = 21,584.59
  5. Step 5: Solve for x
    x = 21,584.59/151.01
  6. Step 6: Final answer
    x = 142.94

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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.