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Finding the Fourth Proportional to 72,481.62, 100,024.41 and 40,651.20

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Solution

The fourth proportional to 72,481.62, 100,024.41 and 40,651.20 is: 56,098.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,481.62 : 100,024.41 = 40,651.20 : x
  2. Step 2: Convert to fraction form
    72,481.62/100,024.41 = 40,651.20/x
  3. Step 3: Cross multiply
    72,481.62x = 100,024.41 × 40,651.20
  4. Step 4: Simplify right side
    72,481.62x = 4,066,112,295.79
  5. Step 5: Solve for x
    x = 4,066,112,295.79/72,481.62
  6. Step 6: Final answer
    x = 56,098.53

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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.