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Finding the Fourth Proportional to 57,790.94, 86,711.45 and 20,377.73

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Solution

The fourth proportional to 57,790.94, 86,711.45 and 20,377.73 is: 30,575.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,790.94 : 86,711.45 = 20,377.73 : x
  2. Step 2: Convert to fraction form
    57,790.94/86,711.45 = 20,377.73/x
  3. Step 3: Cross multiply
    57,790.94x = 86,711.45 × 20,377.73
  4. Step 4: Simplify right side
    57,790.94x = 1,766,982,630.90
  5. Step 5: Solve for x
    x = 1,766,982,630.90/57,790.94
  6. Step 6: Final answer
    x = 30,575.43

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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.