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Finding the Fourth Proportional to 77.73, 116.60 and 59.81

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Solution

The fourth proportional to 77.73, 116.60 and 59.81 is: 89.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.73 : 116.60 = 59.81 : x
  2. Step 2: Convert to fraction form
    77.73/116.60 = 59.81/x
  3. Step 3: Cross multiply
    77.73x = 116.60 × 59.81
  4. Step 4: Simplify right side
    77.73x = 6,972.96
  5. Step 5: Solve for x
    x = 6,972.96/77.73
  6. Step 6: Final answer
    x = 89.71

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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.