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Finding the Fourth Proportional to 54,469.40, 81,704.10 and 40,645.40

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Solution

The fourth proportional to 54,469.40, 81,704.10 and 40,645.40 is: 60,968.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,469.40 : 81,704.10 = 40,645.40 : x
  2. Step 2: Convert to fraction form
    54,469.40/81,704.10 = 40,645.40/x
  3. Step 3: Cross multiply
    54,469.40x = 81,704.10 × 40,645.40
  4. Step 4: Simplify right side
    54,469.40x = 3,320,895,826.14
  5. Step 5: Solve for x
    x = 3,320,895,826.14/54,469.40
  6. Step 6: Final answer
    x = 60,968.10

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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.