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Finding the Fourth Proportional to 151.92, 208.80 and 142.56

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Solution

The fourth proportional to 151.92, 208.80 and 142.56 is: 195.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.92 : 208.80 = 142.56 : x
  2. Step 2: Convert to fraction form
    151.92/208.80 = 142.56/x
  3. Step 3: Cross multiply
    151.92x = 208.80 × 142.56
  4. Step 4: Simplify right side
    151.92x = 29,766.53
  5. Step 5: Solve for x
    x = 29,766.53/151.92
  6. Step 6: Final answer
    x = 195.94

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.