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Finding the Fourth Proportional to 82.61, 124.08 and 75.84

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Solution

The fourth proportional to 82.61, 124.08 and 75.84 is: 113.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.61 : 124.08 = 75.84 : x
  2. Step 2: Convert to fraction form
    82.61/124.08 = 75.84/x
  3. Step 3: Cross multiply
    82.61x = 124.08 × 75.84
  4. Step 4: Simplify right side
    82.61x = 9,410.18
  5. Step 5: Solve for x
    x = 9,410.18/82.61
  6. Step 6: Final answer
    x = 113.90

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