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Finding the Fourth Proportional to 71,843.49, 99,147.08 and 40,012.39

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Solution

The fourth proportional to 71,843.49, 99,147.08 and 40,012.39 is: 55,218.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,843.49 : 99,147.08 = 40,012.39 : x
  2. Step 2: Convert to fraction form
    71,843.49/99,147.08 = 40,012.39/x
  3. Step 3: Cross multiply
    71,843.49x = 99,147.08 × 40,012.39
  4. Step 4: Simplify right side
    71,843.49x = 3,967,111,906.30
  5. Step 5: Solve for x
    x = 3,967,111,906.30/71,843.49
  6. Step 6: Final answer
    x = 55,218.81

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1.5x scale

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.