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Finding the Fourth Proportional to 77.07, 105.52 and 76.33

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Solution

The fourth proportional to 77.07, 105.52 and 76.33 is: 104.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.07 : 105.52 = 76.33 : x
  2. Step 2: Convert to fraction form
    77.07/105.52 = 76.33/x
  3. Step 3: Cross multiply
    77.07x = 105.52 × 76.33
  4. Step 4: Simplify right side
    77.07x = 8,054.34
  5. Step 5: Solve for x
    x = 8,054.34/77.07
  6. Step 6: Final answer
    x = 104.51

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.