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Finding the Fourth Proportional to 71,997.91, 99,356.97 and 40,164.91

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Solution

The fourth proportional to 71,997.91, 99,356.97 and 40,164.91 is: 55,427.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,997.91 : 99,356.97 = 40,164.91 : x
  2. Step 2: Convert to fraction form
    71,997.91/99,356.97 = 40,164.91/x
  3. Step 3: Cross multiply
    71,997.91x = 99,356.97 × 40,164.91
  4. Step 4: Simplify right side
    71,997.91x = 3,990,663,757.92
  5. Step 5: Solve for x
    x = 3,990,663,757.92/71,997.91
  6. Step 6: Final answer
    x = 55,427.49

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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.