Home / 54,154.08-81,219.96-20,862.72

Finding the Fourth Proportional to 54,154.08, 81,219.96 and 20,862.72

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Solution

The fourth proportional to 54,154.08, 81,219.96 and 20,862.72 is: 31,289.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,154.08 : 81,219.96 = 20,862.72 : x
  2. Step 2: Convert to fraction form
    54,154.08/81,219.96 = 20,862.72/x
  3. Step 3: Cross multiply
    54,154.08x = 81,219.96 × 20,862.72
  4. Step 4: Simplify right side
    54,154.08x = 1,694,469,283.89
  5. Step 5: Solve for x
    x = 1,694,469,283.89/54,154.08
  6. Step 6: Final answer
    x = 31,289.78

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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.