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Finding the Fourth Proportional to 77.99, 116.88 and 43.76

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Solution

The fourth proportional to 77.99, 116.88 and 43.76 is: 65.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.99 : 116.88 = 43.76 : x
  2. Step 2: Convert to fraction form
    77.99/116.88 = 43.76/x
  3. Step 3: Cross multiply
    77.99x = 116.88 × 43.76
  4. Step 4: Simplify right side
    77.99x = 5,114.08
  5. Step 5: Solve for x
    x = 5,114.08/77.99
  6. Step 6: Final answer
    x = 65.58

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