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Finding the Fourth Proportional to 71,647.43, 107,369.30 and 52,779.09

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Solution

The fourth proportional to 71,647.43, 107,369.30 and 52,779.09 is: 79,093.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,647.43 : 107,369.30 = 52,779.09 : x
  2. Step 2: Convert to fraction form
    71,647.43/107,369.30 = 52,779.09/x
  3. Step 3: Cross multiply
    71,647.43x = 107,369.30 × 52,779.09
  4. Step 4: Simplify right side
    71,647.43x = 5,666,853,947.94
  5. Step 5: Solve for x
    x = 5,666,853,947.94/71,647.43
  6. Step 6: Final answer
    x = 79,093.61

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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.