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Finding the Fourth Proportional to 45,605.80, 68,408.70 and 40,940.20

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Solution

The fourth proportional to 45,605.80, 68,408.70 and 40,940.20 is: 61,410.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,605.80 : 68,408.70 = 40,940.20 : x
  2. Step 2: Convert to fraction form
    45,605.80/68,408.70 = 40,940.20/x
  3. Step 3: Cross multiply
    45,605.80x = 68,408.70 × 40,940.20
  4. Step 4: Simplify right side
    45,605.80x = 2,800,665,859.74
  5. Step 5: Solve for x
    x = 2,800,665,859.74/45,605.80
  6. Step 6: Final answer
    x = 61,410.30

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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.