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Finding the Fourth Proportional to 66,579.54, 99,920.43 and 27,169.80

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Solution

The fourth proportional to 66,579.54, 99,920.43 and 27,169.80 is: 40,775.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,579.54 : 99,920.43 = 27,169.80 : x
  2. Step 2: Convert to fraction form
    66,579.54/99,920.43 = 27,169.80/x
  3. Step 3: Cross multiply
    66,579.54x = 99,920.43 × 27,169.80
  4. Step 4: Simplify right side
    66,579.54x = 2,714,818,099.01
  5. Step 5: Solve for x
    x = 2,714,818,099.01/66,579.54
  6. Step 6: Final answer
    x = 40,775.56

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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.