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Finding the Fourth Proportional to 75.37, 103.99 and 47.73

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Solution

The fourth proportional to 75.37, 103.99 and 47.73 is: 65.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.37 : 103.99 = 47.73 : x
  2. Step 2: Convert to fraction form
    75.37/103.99 = 47.73/x
  3. Step 3: Cross multiply
    75.37x = 103.99 × 47.73
  4. Step 4: Simplify right side
    75.37x = 4,962.84
  5. Step 5: Solve for x
    x = 4,962.84/75.37
  6. Step 6: Final answer
    x = 65.85

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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.