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Finding the Fourth Proportional to 45,813.80, 68,723.90 and 18,108.20

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Solution

The fourth proportional to 45,813.80, 68,723.90 and 18,108.20 is: 27,163.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,813.80 : 68,723.90 = 18,108.20 : x
  2. Step 2: Convert to fraction form
    45,813.80/68,723.90 = 18,108.20/x
  3. Step 3: Cross multiply
    45,813.80x = 68,723.90 × 18,108.20
  4. Step 4: Simplify right side
    45,813.80x = 1,244,466,125.98
  5. Step 5: Solve for x
    x = 1,244,466,125.98/45,813.80
  6. Step 6: Final answer
    x = 27,163.56

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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.