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Finding the Fourth Proportional to 134, 184.94 and 78.72

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Solution

The fourth proportional to 134, 184.94 and 78.72 is: 108.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    134 : 184.94 = 78.72 : x
  2. Step 2: Convert to fraction form
    134/184.94 = 78.72/x
  3. Step 3: Cross multiply
    134x = 184.94 × 78.72
  4. Step 4: Simplify right side
    134x = 14,558.48
  5. Step 5: Solve for x
    x = 14,558.48/134
  6. Step 6: Final answer
    x = 108.65

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