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Finding the Fourth Proportional to 81,351.44, 121,828.44 and 50,143.76

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Solution

The fourth proportional to 81,351.44, 121,828.44 and 50,143.76 is: 75,093.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,351.44 : 121,828.44 = 50,143.76 : x
  2. Step 2: Convert to fraction form
    81,351.44/121,828.44 = 50,143.76/x
  3. Step 3: Cross multiply
    81,351.44x = 121,828.44 × 50,143.76
  4. Step 4: Simplify right side
    81,351.44x = 6,108,936,056.53
  5. Step 5: Solve for x
    x = 6,108,936,056.53/81,351.44
  6. Step 6: Final answer
    x = 75,093.15

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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.