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Finding the Fourth Proportional to 73,142.65, 100,936.28 and 39,608.65

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Solution

The fourth proportional to 73,142.65, 100,936.28 and 39,608.65 is: 54,659.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,142.65 : 100,936.28 = 39,608.65 : x
  2. Step 2: Convert to fraction form
    73,142.65/100,936.28 = 39,608.65/x
  3. Step 3: Cross multiply
    73,142.65x = 100,936.28 × 39,608.65
  4. Step 4: Simplify right side
    73,142.65x = 3,997,949,786.82
  5. Step 5: Solve for x
    x = 3,997,949,786.82/73,142.65
  6. Step 6: Final answer
    x = 54,659.62

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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.