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Finding the Fourth Proportional to 77.56, 116.81 and 67.54

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Solution

The fourth proportional to 77.56, 116.81 and 67.54 is: 101.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.56 : 116.81 = 67.54 : x
  2. Step 2: Convert to fraction form
    77.56/116.81 = 67.54/x
  3. Step 3: Cross multiply
    77.56x = 116.81 × 67.54
  4. Step 4: Simplify right side
    77.56x = 7,889.00
  5. Step 5: Solve for x
    x = 7,889.00/77.56
  6. Step 6: Final answer
    x = 101.71

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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.