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Finding the Fourth Proportional to 71,660.88, 98,891.64 and 39,396.24

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Solution

The fourth proportional to 71,660.88, 98,891.64 and 39,396.24 is: 54,366.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,660.88 : 98,891.64 = 39,396.24 : x
  2. Step 2: Convert to fraction form
    71,660.88/98,891.64 = 39,396.24/x
  3. Step 3: Cross multiply
    71,660.88x = 98,891.64 × 39,396.24
  4. Step 4: Simplify right side
    71,660.88x = 3,895,958,783.43
  5. Step 5: Solve for x
    x = 3,895,958,783.43/71,660.88
  6. Step 6: Final answer
    x = 54,366.61

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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.