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Finding the Fourth Proportional to 76.78, 115.08 and 62.29

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Solution

The fourth proportional to 76.78, 115.08 and 62.29 is: 93.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.78 : 115.08 = 62.29 : x
  2. Step 2: Convert to fraction form
    76.78/115.08 = 62.29/x
  3. Step 3: Cross multiply
    76.78x = 115.08 × 62.29
  4. Step 4: Simplify right side
    76.78x = 7,168.33
  5. Step 5: Solve for x
    x = 7,168.33/76.78
  6. Step 6: Final answer
    x = 93.36

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