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Finding the Fourth Proportional to 162.74, 244.20 and 81.56

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Solution

The fourth proportional to 162.74, 244.20 and 81.56 is: 122.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.74 : 244.20 = 81.56 : x
  2. Step 2: Convert to fraction form
    162.74/244.20 = 81.56/x
  3. Step 3: Cross multiply
    162.74x = 244.20 × 81.56
  4. Step 4: Simplify right side
    162.74x = 19,916.95
  5. Step 5: Solve for x
    x = 19,916.95/162.74
  6. Step 6: Final answer
    x = 122.39

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