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Finding the Fourth Proportional to 54,478.52, 81,723.08 and 21,201.29

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Solution

The fourth proportional to 54,478.52, 81,723.08 and 21,201.29 is: 31,803.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,478.52 : 81,723.08 = 21,201.29 : x
  2. Step 2: Convert to fraction form
    54,478.52/81,723.08 = 21,201.29/x
  3. Step 3: Cross multiply
    54,478.52x = 81,723.08 × 21,201.29
  4. Step 4: Simplify right side
    54,478.52x = 1,732,634,363.16
  5. Step 5: Solve for x
    x = 1,732,634,363.16/54,478.52
  6. Step 6: Final answer
    x = 31,803.99

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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.