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Finding the Fourth Proportional to 77.23, 107.02 and 73.18

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Solution

The fourth proportional to 77.23, 107.02 and 73.18 is: 101.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.23 : 107.02 = 73.18 : x
  2. Step 2: Convert to fraction form
    77.23/107.02 = 73.18/x
  3. Step 3: Cross multiply
    77.23x = 107.02 × 73.18
  4. Step 4: Simplify right side
    77.23x = 7,831.72
  5. Step 5: Solve for x
    x = 7,831.72/77.23
  6. Step 6: Final answer
    x = 101.41

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.