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Finding the Fourth Proportional to 49.98, 69.03 and 39.63

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Solution

The fourth proportional to 49.98, 69.03 and 39.63 is: 54.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.98 : 69.03 = 39.63 : x
  2. Step 2: Convert to fraction form
    49.98/69.03 = 39.63/x
  3. Step 3: Cross multiply
    49.98x = 69.03 × 39.63
  4. Step 4: Simplify right side
    49.98x = 2,735.66
  5. Step 5: Solve for x
    x = 2,735.66/49.98
  6. Step 6: Final answer
    x = 54.74

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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.