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Finding the Fourth Proportional to 54,912.88, 81,662.88 and 53,163.28

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Solution

The fourth proportional to 54,912.88, 81,662.88 and 53,163.28 is: 79,060.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,912.88 : 81,662.88 = 53,163.28 : x
  2. Step 2: Convert to fraction form
    54,912.88/81,662.88 = 53,163.28/x
  3. Step 3: Cross multiply
    54,912.88x = 81,662.88 × 53,163.28
  4. Step 4: Simplify right side
    54,912.88x = 4,341,466,555.05
  5. Step 5: Solve for x
    x = 4,341,466,555.05/54,912.88
  6. Step 6: Final answer
    x = 79,060.99

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.