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Finding the Fourth Proportional to 50.54, 69.72 and 39.45

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Solution

The fourth proportional to 50.54, 69.72 and 39.45 is: 54.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.54 : 69.72 = 39.45 : x
  2. Step 2: Convert to fraction form
    50.54/69.72 = 39.45/x
  3. Step 3: Cross multiply
    50.54x = 69.72 × 39.45
  4. Step 4: Simplify right side
    50.54x = 2,750.26
  5. Step 5: Solve for x
    x = 2,750.26/50.54
  6. Step 6: Final answer
    x = 54.42

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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.