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Finding the Fourth Proportional to 83,321.38, 124,982.07 and 20,996.74

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Solution

The fourth proportional to 83,321.38, 124,982.07 and 20,996.74 is: 31,495.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,321.38 : 124,982.07 = 20,996.74 : x
  2. Step 2: Convert to fraction form
    83,321.38/124,982.07 = 20,996.74/x
  3. Step 3: Cross multiply
    83,321.38x = 124,982.07 × 20,996.74
  4. Step 4: Simplify right side
    83,321.38x = 2,624,216,028.45
  5. Step 5: Solve for x
    x = 2,624,216,028.45/83,321.38
  6. Step 6: Final answer
    x = 31,495.11

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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.