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Finding the Fourth Proportional to 92.73, 139.07 and 28.59

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Solution

The fourth proportional to 92.73, 139.07 and 28.59 is: 42.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.73 : 139.07 = 28.59 : x
  2. Step 2: Convert to fraction form
    92.73/139.07 = 28.59/x
  3. Step 3: Cross multiply
    92.73x = 139.07 × 28.59
  4. Step 4: Simplify right side
    92.73x = 3,975.87
  5. Step 5: Solve for x
    x = 3,975.87/92.73
  6. Step 6: Final answer
    x = 42.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.