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Finding the Fourth Proportional to 71,170.60, 98,213.70 and 39,338.68

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Solution

The fourth proportional to 71,170.60, 98,213.70 and 39,338.68 is: 54,286.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,170.60 : 98,213.70 = 39,338.68 : x
  2. Step 2: Convert to fraction form
    71,170.60/98,213.70 = 39,338.68/x
  3. Step 3: Cross multiply
    71,170.60x = 98,213.70 × 39,338.68
  4. Step 4: Simplify right side
    71,170.60x = 3,863,597,315.92
  5. Step 5: Solve for x
    x = 3,863,597,315.92/71,170.60
  6. Step 6: Final answer
    x = 54,286.42

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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.