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Finding the Fourth Proportional to 65.91, 98.92 and 50.73

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Solution

The fourth proportional to 65.91, 98.92 and 50.73 is: 76.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.91 : 98.92 = 50.73 : x
  2. Step 2: Convert to fraction form
    65.91/98.92 = 50.73/x
  3. Step 3: Cross multiply
    65.91x = 98.92 × 50.73
  4. Step 4: Simplify right side
    65.91x = 5,017.90
  5. Step 5: Solve for x
    x = 5,017.90/65.91
  6. Step 6: Final answer
    x = 76.13

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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.