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Finding the Fourth Proportional to 54,452.40, 81,662.40 and 21,153.30

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Solution

The fourth proportional to 54,452.40, 81,662.40 and 21,153.30 is: 31,723.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,452.40 : 81,662.40 = 21,153.30 : x
  2. Step 2: Convert to fraction form
    54,452.40/81,662.40 = 21,153.30/x
  3. Step 3: Cross multiply
    54,452.40x = 81,662.40 × 21,153.30
  4. Step 4: Simplify right side
    54,452.40x = 1,727,429,245.92
  5. Step 5: Solve for x
    x = 1,727,429,245.92/54,452.40
  6. Step 6: Final answer
    x = 31,723.66

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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.