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Finding the Fourth Proportional to 142.56, 213.89 and 61.41

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Solution

The fourth proportional to 142.56, 213.89 and 61.41 is: 92.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.56 : 213.89 = 61.41 : x
  2. Step 2: Convert to fraction form
    142.56/213.89 = 61.41/x
  3. Step 3: Cross multiply
    142.56x = 213.89 × 61.41
  4. Step 4: Simplify right side
    142.56x = 13,134.98
  5. Step 5: Solve for x
    x = 13,134.98/142.56
  6. Step 6: Final answer
    x = 92.14

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