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Finding the Fourth Proportional to 68.77, 102.98 and 45.91

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Solution

The fourth proportional to 68.77, 102.98 and 45.91 is: 68.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.77 : 102.98 = 45.91 : x
  2. Step 2: Convert to fraction form
    68.77/102.98 = 45.91/x
  3. Step 3: Cross multiply
    68.77x = 102.98 × 45.91
  4. Step 4: Simplify right side
    68.77x = 4,727.81
  5. Step 5: Solve for x
    x = 4,727.81/68.77
  6. Step 6: Final answer
    x = 68.75

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