Home / 111,979.45-167,869.99-80,309.87

Finding the Fourth Proportional to 111,979.45, 167,869.99 and 80,309.87

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Solution

The fourth proportional to 111,979.45, 167,869.99 and 80,309.87 is: 120,393.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,979.45 : 167,869.99 = 80,309.87 : x
  2. Step 2: Convert to fraction form
    111,979.45/167,869.99 = 80,309.87/x
  3. Step 3: Cross multiply
    111,979.45x = 167,869.99 × 80,309.87
  4. Step 4: Simplify right side
    111,979.45x = 13,481,615,832.90
  5. Step 5: Solve for x
    x = 13,481,615,832.90/111,979.45
  6. Step 6: Final answer
    x = 120,393.66

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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.