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Finding the Fourth Proportional to 81,794.40, 122,691.60 and 79,072.80

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Solution

The fourth proportional to 81,794.40, 122,691.60 and 79,072.80 is: 118,609.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,794.40 : 122,691.60 = 79,072.80 : x
  2. Step 2: Convert to fraction form
    81,794.40/122,691.60 = 79,072.80/x
  3. Step 3: Cross multiply
    81,794.40x = 122,691.60 × 79,072.80
  4. Step 4: Simplify right side
    81,794.40x = 9,701,568,348.48
  5. Step 5: Solve for x
    x = 9,701,568,348.48/81,794.40
  6. Step 6: Final answer
    x = 118,609.20

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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.