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Finding the Fourth Proportional to 83.99, 125.82 and 61.22

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Solution

The fourth proportional to 83.99, 125.82 and 61.22 is: 91.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.99 : 125.82 = 61.22 : x
  2. Step 2: Convert to fraction form
    83.99/125.82 = 61.22/x
  3. Step 3: Cross multiply
    83.99x = 125.82 × 61.22
  4. Step 4: Simplify right side
    83.99x = 7,702.07
  5. Step 5: Solve for x
    x = 7,702.07/83.99
  6. Step 6: Final answer
    x = 91.70

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