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Finding the Fourth Proportional to 59.82, 90.15 and 50.91

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Solution

The fourth proportional to 59.82, 90.15 and 50.91 is: 76.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.82 : 90.15 = 50.91 : x
  2. Step 2: Convert to fraction form
    59.82/90.15 = 50.91/x
  3. Step 3: Cross multiply
    59.82x = 90.15 × 50.91
  4. Step 4: Simplify right side
    59.82x = 4,589.54
  5. Step 5: Solve for x
    x = 4,589.54/59.82
  6. Step 6: Final answer
    x = 76.72

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.