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Finding the Fourth Proportional to 54,004.20, 80,967.90 and 20,711.40

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Solution

The fourth proportional to 54,004.20, 80,967.90 and 20,711.40 is: 31,052.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,004.20 : 80,967.90 = 20,711.40 : x
  2. Step 2: Convert to fraction form
    54,004.20/80,967.90 = 20,711.40/x
  3. Step 3: Cross multiply
    54,004.20x = 80,967.90 × 20,711.40
  4. Step 4: Simplify right side
    54,004.20x = 1,676,958,564.06
  5. Step 5: Solve for x
    x = 1,676,958,564.06/54,004.20
  6. Step 6: Final answer
    x = 31,052.37

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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.