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Finding the Fourth Proportional to 63,418.40, 87,434.40 and 54,561.04

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Solution

The fourth proportional to 63,418.40, 87,434.40 and 54,561.04 is: 75,222.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,418.40 : 87,434.40 = 54,561.04 : x
  2. Step 2: Convert to fraction form
    63,418.40/87,434.40 = 54,561.04/x
  3. Step 3: Cross multiply
    63,418.40x = 87,434.40 × 54,561.04
  4. Step 4: Simplify right side
    63,418.40x = 4,770,511,795.78
  5. Step 5: Solve for x
    x = 4,770,511,795.78/63,418.40
  6. Step 6: Final answer
    x = 75,222.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.