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Finding the Fourth Proportional to 73,149, 100,945.62 and 39,615

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Solution

The fourth proportional to 73,149, 100,945.62 and 39,615 is: 54,668.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,149 : 100,945.62 = 39,615 : x
  2. Step 2: Convert to fraction form
    73,149/100,945.62 = 39,615/x
  3. Step 3: Cross multiply
    73,149x = 100,945.62 × 39,615
  4. Step 4: Simplify right side
    73,149x = 3,998,960,736.30
  5. Step 5: Solve for x
    x = 3,998,960,736.30/73,149
  6. Step 6: Final answer
    x = 54,668.70

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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.