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Finding the Fourth Proportional to 54,325.20, 81,439.20 and 21,034.20

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Solution

The fourth proportional to 54,325.20, 81,439.20 and 21,034.20 is: 31,532.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,325.20 : 81,439.20 = 21,034.20 : x
  2. Step 2: Convert to fraction form
    54,325.20/81,439.20 = 21,034.20/x
  3. Step 3: Cross multiply
    54,325.20x = 81,439.20 × 21,034.20
  4. Step 4: Simplify right side
    54,325.20x = 1,713,008,420.64
  5. Step 5: Solve for x
    x = 1,713,008,420.64/54,325.20
  6. Step 6: Final answer
    x = 31,532.48

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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.