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Finding the Fourth Proportional to 140.41, 210.60 and 71.76

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Solution

The fourth proportional to 140.41, 210.60 and 71.76 is: 107.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.41 : 210.60 = 71.76 : x
  2. Step 2: Convert to fraction form
    140.41/210.60 = 71.76/x
  3. Step 3: Cross multiply
    140.41x = 210.60 × 71.76
  4. Step 4: Simplify right side
    140.41x = 15,112.66
  5. Step 5: Solve for x
    x = 15,112.66/140.41
  6. Step 6: Final answer
    x = 107.63

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