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Finding the Fourth Proportional to 59.48, 82.18 and 49.80

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Solution

The fourth proportional to 59.48, 82.18 and 49.80 is: 68.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.48 : 82.18 = 49.80 : x
  2. Step 2: Convert to fraction form
    59.48/82.18 = 49.80/x
  3. Step 3: Cross multiply
    59.48x = 82.18 × 49.80
  4. Step 4: Simplify right side
    59.48x = 4,092.56
  5. Step 5: Solve for x
    x = 4,092.56/59.48
  6. Step 6: Final answer
    x = 68.81

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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.