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Finding the Fourth Proportional to 71,727.49, 108,128.44 and 66,910.62

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Solution

The fourth proportional to 71,727.49, 108,128.44 and 66,910.62 is: 100,867.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,727.49 : 108,128.44 = 66,910.62 : x
  2. Step 2: Convert to fraction form
    71,727.49/108,128.44 = 66,910.62/x
  3. Step 3: Cross multiply
    71,727.49x = 108,128.44 × 66,910.62
  4. Step 4: Simplify right side
    71,727.49x = 7,234,940,960.03
  5. Step 5: Solve for x
    x = 7,234,940,960.03/71,727.49
  6. Step 6: Final answer
    x = 100,867.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.