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Finding the Fourth Proportional to 71,721.20, 107,581.80 and 36,729.20

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Solution

The fourth proportional to 71,721.20, 107,581.80 and 36,729.20 is: 55,093.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,721.20 : 107,581.80 = 36,729.20 : x
  2. Step 2: Convert to fraction form
    71,721.20/107,581.80 = 36,729.20/x
  3. Step 3: Cross multiply
    71,721.20x = 107,581.80 × 36,729.20
  4. Step 4: Simplify right side
    71,721.20x = 3,951,393,448.56
  5. Step 5: Solve for x
    x = 3,951,393,448.56/71,721.20
  6. Step 6: Final answer
    x = 55,093.80

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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.