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Finding the Fourth Proportional to 89.78, 134.54 and 44.06

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Solution

The fourth proportional to 89.78, 134.54 and 44.06 is: 66.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.78 : 134.54 = 44.06 : x
  2. Step 2: Convert to fraction form
    89.78/134.54 = 44.06/x
  3. Step 3: Cross multiply
    89.78x = 134.54 × 44.06
  4. Step 4: Simplify right side
    89.78x = 5,927.83
  5. Step 5: Solve for x
    x = 5,927.83/89.78
  6. Step 6: Final answer
    x = 66.03

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