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Finding the Fourth Proportional to 129.06, 193.32 and 83.30

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Solution

The fourth proportional to 129.06, 193.32 and 83.30 is: 124.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.06 : 193.32 = 83.30 : x
  2. Step 2: Convert to fraction form
    129.06/193.32 = 83.30/x
  3. Step 3: Cross multiply
    129.06x = 193.32 × 83.30
  4. Step 4: Simplify right side
    129.06x = 16,102.59
  5. Step 5: Solve for x
    x = 16,102.59/129.06
  6. Step 6: Final answer
    x = 124.77

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