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Finding the Fourth Proportional to 54,659.87, 81,989.90 and 15,216.99

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Solution

The fourth proportional to 54,659.87, 81,989.90 and 15,216.99 is: 22,825.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,659.87 : 81,989.90 = 15,216.99 : x
  2. Step 2: Convert to fraction form
    54,659.87/81,989.90 = 15,216.99/x
  3. Step 3: Cross multiply
    54,659.87x = 81,989.90 × 15,216.99
  4. Step 4: Simplify right side
    54,659.87x = 1,247,639,488.40
  5. Step 5: Solve for x
    x = 1,247,639,488.40/54,659.87
  6. Step 6: Final answer
    x = 22,825.51

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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.