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Finding the Fourth Proportional to 54,581.87, 81,872.80 and 15,138.99

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Solution

The fourth proportional to 54,581.87, 81,872.80 and 15,138.99 is: 22,708.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,581.87 : 81,872.80 = 15,138.99 : x
  2. Step 2: Convert to fraction form
    54,581.87/81,872.80 = 15,138.99/x
  3. Step 3: Cross multiply
    54,581.87x = 81,872.80 × 15,138.99
  4. Step 4: Simplify right side
    54,581.87x = 1,239,471,500.47
  5. Step 5: Solve for x
    x = 1,239,471,500.47/54,581.87
  6. Step 6: Final answer
    x = 22,708.48

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1.5x scale

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.