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Finding the Fourth Proportional to 54,575.40, 81,846.90 and 21,276.30

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Solution

The fourth proportional to 54,575.40, 81,846.90 and 21,276.30 is: 31,908.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,575.40 : 81,846.90 = 21,276.30 : x
  2. Step 2: Convert to fraction form
    54,575.40/81,846.90 = 21,276.30/x
  3. Step 3: Cross multiply
    54,575.40x = 81,846.90 × 21,276.30
  4. Step 4: Simplify right side
    54,575.40x = 1,741,399,198.47
  5. Step 5: Solve for x
    x = 1,741,399,198.47/54,575.40
  6. Step 6: Final answer
    x = 31,908.13

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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.