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Finding the Fourth Proportional to 61,857.56, 85,310.78 and 41,687.95

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Solution

The fourth proportional to 61,857.56, 85,310.78 and 41,687.95 is: 57,493.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,857.56 : 85,310.78 = 41,687.95 : x
  2. Step 2: Convert to fraction form
    61,857.56/85,310.78 = 41,687.95/x
  3. Step 3: Cross multiply
    61,857.56x = 85,310.78 × 41,687.95
  4. Step 4: Simplify right side
    61,857.56x = 3,556,431,531.10
  5. Step 5: Solve for x
    x = 3,556,431,531.10/61,857.56
  6. Step 6: Final answer
    x = 57,493.89

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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.