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Finding the Fourth Proportional to 72,118.78, 108,176.99 and 27,755.15

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Solution

The fourth proportional to 72,118.78, 108,176.99 and 27,755.15 is: 41,632.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,118.78 : 108,176.99 = 27,755.15 : x
  2. Step 2: Convert to fraction form
    72,118.78/108,176.99 = 27,755.15/x
  3. Step 3: Cross multiply
    72,118.78x = 108,176.99 × 27,755.15
  4. Step 4: Simplify right side
    72,118.78x = 3,002,467,904.34
  5. Step 5: Solve for x
    x = 3,002,467,904.34/72,118.78
  6. Step 6: Final answer
    x = 41,632.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.