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Finding the Fourth Proportional to 71,382.40, 107,073.60 and 68,660.80

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Solution

The fourth proportional to 71,382.40, 107,073.60 and 68,660.80 is: 102,991.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,382.40 : 107,073.60 = 68,660.80 : x
  2. Step 2: Convert to fraction form
    71,382.40/107,073.60 = 68,660.80/x
  3. Step 3: Cross multiply
    71,382.40x = 107,073.60 × 68,660.80
  4. Step 4: Simplify right side
    71,382.40x = 7,351,759,034.88
  5. Step 5: Solve for x
    x = 7,351,759,034.88/71,382.40
  6. Step 6: Final answer
    x = 102,991.20

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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.