Home / 81,872.48-122,732.04-74,568.44

Finding the Fourth Proportional to 81,872.48, 122,732.04 and 74,568.44

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Solution

The fourth proportional to 81,872.48, 122,732.04 and 74,568.44 is: 111,782.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,872.48 : 122,732.04 = 74,568.44 : x
  2. Step 2: Convert to fraction form
    81,872.48/122,732.04 = 74,568.44/x
  3. Step 3: Cross multiply
    81,872.48x = 122,732.04 × 74,568.44
  4. Step 4: Simplify right side
    81,872.48x = 9,151,936,760.82
  5. Step 5: Solve for x
    x = 9,151,936,760.82/81,872.48
  6. Step 6: Final answer
    x = 111,782.82

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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.