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Finding the Fourth Proportional to 72,350.72, 99,843.99 and 40,519.64

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Solution

The fourth proportional to 72,350.72, 99,843.99 and 40,519.64 is: 55,917.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,350.72 : 99,843.99 = 40,519.64 : x
  2. Step 2: Convert to fraction form
    72,350.72/99,843.99 = 40,519.64/x
  3. Step 3: Cross multiply
    72,350.72x = 99,843.99 × 40,519.64
  4. Step 4: Simplify right side
    72,350.72x = 4,045,642,856.55
  5. Step 5: Solve for x
    x = 4,045,642,856.55/72,350.72
  6. Step 6: Final answer
    x = 55,917.11

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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.