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Finding the Fourth Proportional to 71,231.92, 106,844.91 and 18,640.24

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Solution

The fourth proportional to 71,231.92, 106,844.91 and 18,640.24 is: 27,959.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,231.92 : 106,844.91 = 18,640.24 : x
  2. Step 2: Convert to fraction form
    71,231.92/106,844.91 = 18,640.24/x
  3. Step 3: Cross multiply
    71,231.92x = 106,844.91 × 18,640.24
  4. Step 4: Simplify right side
    71,231.92x = 1,991,614,765.18
  5. Step 5: Solve for x
    x = 1,991,614,765.18/71,231.92
  6. Step 6: Final answer
    x = 27,959.58

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1.5x scale

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.