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Finding the Fourth Proportional to 82,704.80, 124,105.80 and 30,119.60

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Solution

The fourth proportional to 82,704.80, 124,105.80 and 30,119.60 is: 45,197.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,704.80 : 124,105.80 = 30,119.60 : x
  2. Step 2: Convert to fraction form
    82,704.80/124,105.80 = 30,119.60/x
  3. Step 3: Cross multiply
    82,704.80x = 124,105.80 × 30,119.60
  4. Step 4: Simplify right side
    82,704.80x = 3,738,017,053.68
  5. Step 5: Solve for x
    x = 3,738,017,053.68/82,704.80
  6. Step 6: Final answer
    x = 45,197.10

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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.