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Finding the Fourth Proportional to 71,628.87, 98,847.13 and 39,797.09

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Solution

The fourth proportional to 71,628.87, 98,847.13 and 39,797.09 is: 54,919.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,628.87 : 98,847.13 = 39,797.09 : x
  2. Step 2: Convert to fraction form
    71,628.87/98,847.13 = 39,797.09/x
  3. Step 3: Cross multiply
    71,628.87x = 98,847.13 × 39,797.09
  4. Step 4: Simplify right side
    71,628.87x = 3,933,828,128.85
  5. Step 5: Solve for x
    x = 3,933,828,128.85/71,628.87
  6. Step 6: Final answer
    x = 54,919.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.