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Finding the Fourth Proportional to 139,270.99, 192,194.75 and 81,912.73

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Solution

The fourth proportional to 139,270.99, 192,194.75 and 81,912.73 is: 113,040.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,270.99 : 192,194.75 = 81,912.73 : x
  2. Step 2: Convert to fraction form
    139,270.99/192,194.75 = 81,912.73/x
  3. Step 3: Cross multiply
    139,270.99x = 192,194.75 × 81,912.73
  4. Step 4: Simplify right side
    139,270.99x = 15,743,196,664.17
  5. Step 5: Solve for x
    x = 15,743,196,664.17/139,270.99
  6. Step 6: Final answer
    x = 113,040.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.