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Finding the Fourth Proportional to 45,682.80, 68,491.80 and 20,734.80

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Solution

The fourth proportional to 45,682.80, 68,491.80 and 20,734.80 is: 31,087.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,682.80 : 68,491.80 = 20,734.80 : x
  2. Step 2: Convert to fraction form
    45,682.80/68,491.80 = 20,734.80/x
  3. Step 3: Cross multiply
    45,682.80x = 68,491.80 × 20,734.80
  4. Step 4: Simplify right side
    45,682.80x = 1,420,163,774.64
  5. Step 5: Solve for x
    x = 1,420,163,774.64/45,682.80
  6. Step 6: Final answer
    x = 31,087.49

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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.