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Finding the Fourth Proportional to 66,568.78, 91,861.20 and 37,887.58

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Solution

The fourth proportional to 66,568.78, 91,861.20 and 37,887.58 is: 52,282.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,568.78 : 91,861.20 = 37,887.58 : x
  2. Step 2: Convert to fraction form
    66,568.78/91,861.20 = 37,887.58/x
  3. Step 3: Cross multiply
    66,568.78x = 91,861.20 × 37,887.58
  4. Step 4: Simplify right side
    66,568.78x = 3,480,398,563.90
  5. Step 5: Solve for x
    x = 3,480,398,563.90/66,568.78
  6. Step 6: Final answer
    x = 52,282.75

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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.