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Finding the Fourth Proportional to 81,361.13, 122,043.87 and 25,957.13

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Solution

The fourth proportional to 81,361.13, 122,043.87 and 25,957.13 is: 38,936.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,361.13 : 122,043.87 = 25,957.13 : x
  2. Step 2: Convert to fraction form
    81,361.13/122,043.87 = 25,957.13/x
  3. Step 3: Cross multiply
    81,361.13x = 122,043.87 × 25,957.13
  4. Step 4: Simplify right side
    81,361.13x = 3,167,907,989.07
  5. Step 5: Solve for x
    x = 3,167,907,989.07/81,361.13
  6. Step 6: Final answer
    x = 38,936.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.