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Finding the Fourth Proportional to 54,574.40, 81,845.40 and 21,275.30

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Solution

The fourth proportional to 54,574.40, 81,845.40 and 21,275.30 is: 31,906.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,574.40 : 81,845.40 = 21,275.30 : x
  2. Step 2: Convert to fraction form
    54,574.40/81,845.40 = 21,275.30/x
  3. Step 3: Cross multiply
    54,574.40x = 81,845.40 × 21,275.30
  4. Step 4: Simplify right side
    54,574.40x = 1,741,285,438.62
  5. Step 5: Solve for x
    x = 1,741,285,438.62/54,574.40
  6. Step 6: Final answer
    x = 31,906.63

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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.