Home / 107,721.48-161,439.66-82,665.78

Finding the Fourth Proportional to 107,721.48, 161,439.66 and 82,665.78

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Solution

The fourth proportional to 107,721.48, 161,439.66 and 82,665.78 is: 123,889.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,721.48 : 161,439.66 = 82,665.78 : x
  2. Step 2: Convert to fraction form
    107,721.48/161,439.66 = 82,665.78/x
  3. Step 3: Cross multiply
    107,721.48x = 161,439.66 × 82,665.78
  4. Step 4: Simplify right side
    107,721.48x = 13,345,535,416.83
  5. Step 5: Solve for x
    x = 13,345,535,416.83/107,721.48
  6. Step 6: Final answer
    x = 123,889.27

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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.