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Finding the Fourth Proportional to 151.25, 208.81 and 104.06

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Solution

The fourth proportional to 151.25, 208.81 and 104.06 is: 143.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.25 : 208.81 = 104.06 : x
  2. Step 2: Convert to fraction form
    151.25/208.81 = 104.06/x
  3. Step 3: Cross multiply
    151.25x = 208.81 × 104.06
  4. Step 4: Simplify right side
    151.25x = 21,728.25
  5. Step 5: Solve for x
    x = 21,728.25/151.25
  6. Step 6: Final answer
    x = 143.66

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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.