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Finding the Fourth Proportional to 54,004.10, 80,981.85 and 20,713.10

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Solution

The fourth proportional to 54,004.10, 80,981.85 and 20,713.10 is: 31,060.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,004.10 : 80,981.85 = 20,713.10 : x
  2. Step 2: Convert to fraction form
    54,004.10/80,981.85 = 20,713.10/x
  3. Step 3: Cross multiply
    54,004.10x = 80,981.85 × 20,713.10
  4. Step 4: Simplify right side
    54,004.10x = 1,677,385,157.24
  5. Step 5: Solve for x
    x = 1,677,385,157.24/54,004.10
  6. Step 6: Final answer
    x = 31,060.33

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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.