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Finding the Fourth Proportional to 82,949.70, 124,425.01 and 20,620.20

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Solution

The fourth proportional to 82,949.70, 124,425.01 and 20,620.20 is: 30,930.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,949.70 : 124,425.01 = 20,620.20 : x
  2. Step 2: Convert to fraction form
    82,949.70/124,425.01 = 20,620.20/x
  3. Step 3: Cross multiply
    82,949.70x = 124,425.01 × 20,620.20
  4. Step 4: Simplify right side
    82,949.70x = 2,565,668,033.74
  5. Step 5: Solve for x
    x = 2,565,668,033.74/82,949.70
  6. Step 6: Final answer
    x = 30,930.41

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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.