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Finding the Fourth Proportional to 54,127.79, 81,191.78 and 20,863.52

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Solution

The fourth proportional to 54,127.79, 81,191.78 and 20,863.52 is: 31,295.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,127.79 : 81,191.78 = 20,863.52 : x
  2. Step 2: Convert to fraction form
    54,127.79/81,191.78 = 20,863.52/x
  3. Step 3: Cross multiply
    54,127.79x = 81,191.78 × 20,863.52
  4. Step 4: Simplify right side
    54,127.79x = 1,693,945,972.07
  5. Step 5: Solve for x
    x = 1,693,945,972.07/54,127.79
  6. Step 6: Final answer
    x = 31,295.31

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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.