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Finding the Fourth Proportional to 96.78, 145.09 and 62.56

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Solution

The fourth proportional to 96.78, 145.09 and 62.56 is: 93.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.78 : 145.09 = 62.56 : x
  2. Step 2: Convert to fraction form
    96.78/145.09 = 62.56/x
  3. Step 3: Cross multiply
    96.78x = 145.09 × 62.56
  4. Step 4: Simplify right side
    96.78x = 9,075.79
  5. Step 5: Solve for x
    x = 9,075.79/96.78
  6. Step 6: Final answer
    x = 93.78

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