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Finding the Fourth Proportional to 83,694.81, 125,542.42 and 20,515.22

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Solution

The fourth proportional to 83,694.81, 125,542.42 and 20,515.22 is: 30,772.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,694.81 : 125,542.42 = 20,515.22 : x
  2. Step 2: Convert to fraction form
    83,694.81/125,542.42 = 20,515.22/x
  3. Step 3: Cross multiply
    83,694.81x = 125,542.42 × 20,515.22
  4. Step 4: Simplify right side
    83,694.81x = 2,575,529,686.63
  5. Step 5: Solve for x
    x = 2,575,529,686.63/83,694.81
  6. Step 6: Final answer
    x = 30,772.87

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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.