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Finding the Fourth Proportional to 54,273.20, 81,424.20 and 19,209.20

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Solution

The fourth proportional to 54,273.20, 81,424.20 and 19,209.20 is: 28,818.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,273.20 : 81,424.20 = 19,209.20 : x
  2. Step 2: Convert to fraction form
    54,273.20/81,424.20 = 19,209.20/x
  3. Step 3: Cross multiply
    54,273.20x = 81,424.20 × 19,209.20
  4. Step 4: Simplify right side
    54,273.20x = 1,564,093,742.64
  5. Step 5: Solve for x
    x = 1,564,093,742.64/54,273.20
  6. Step 6: Final answer
    x = 28,818.90

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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.