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Finding the Fourth Proportional to 73.78, 101.77 and 50.47

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Solution

The fourth proportional to 73.78, 101.77 and 50.47 is: 69.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.78 : 101.77 = 50.47 : x
  2. Step 2: Convert to fraction form
    73.78/101.77 = 50.47/x
  3. Step 3: Cross multiply
    73.78x = 101.77 × 50.47
  4. Step 4: Simplify right side
    73.78x = 5,135.57
  5. Step 5: Solve for x
    x = 5,135.57/73.78
  6. Step 6: Final answer
    x = 69.61

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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.