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Finding the Fourth Proportional to 73,181.43, 100,990.50 and 39,647.43

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Solution

The fourth proportional to 73,181.43, 100,990.50 and 39,647.43 is: 54,713.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,181.43 : 100,990.50 = 39,647.43 : x
  2. Step 2: Convert to fraction form
    73,181.43/100,990.50 = 39,647.43/x
  3. Step 3: Cross multiply
    73,181.43x = 100,990.50 × 39,647.43
  4. Step 4: Simplify right side
    73,181.43x = 4,004,013,779.42
  5. Step 5: Solve for x
    x = 4,004,013,779.42/73,181.43
  6. Step 6: Final answer
    x = 54,713.52

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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.