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Finding the Fourth Proportional to 81,368.40, 122,072.09 and 33,957.12

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Solution

The fourth proportional to 81,368.40, 122,072.09 and 33,957.12 is: 50,943.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,368.40 : 122,072.09 = 33,957.12 : x
  2. Step 2: Convert to fraction form
    81,368.40/122,072.09 = 33,957.12/x
  3. Step 3: Cross multiply
    81,368.40x = 122,072.09 × 33,957.12
  4. Step 4: Simplify right side
    81,368.40x = 4,145,216,439.00
  5. Step 5: Solve for x
    x = 4,145,216,439.00/81,368.40
  6. Step 6: Final answer
    x = 50,943.81

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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.