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Finding the Fourth Proportional to 74.90, 112.44 and 50.54

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Solution

The fourth proportional to 74.90, 112.44 and 50.54 is: 75.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.90 : 112.44 = 50.54 : x
  2. Step 2: Convert to fraction form
    74.90/112.44 = 50.54/x
  3. Step 3: Cross multiply
    74.90x = 112.44 × 50.54
  4. Step 4: Simplify right side
    74.90x = 5,682.72
  5. Step 5: Solve for x
    x = 5,682.72/74.90
  6. Step 6: Final answer
    x = 75.87

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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.