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Finding the Fourth Proportional to 57,940.29, 86,752.38 and 43,857.63

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Solution

The fourth proportional to 57,940.29, 86,752.38 and 43,857.63 is: 65,666.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,940.29 : 86,752.38 = 43,857.63 : x
  2. Step 2: Convert to fraction form
    57,940.29/86,752.38 = 43,857.63/x
  3. Step 3: Cross multiply
    57,940.29x = 86,752.38 × 43,857.63
  4. Step 4: Simplify right side
    57,940.29x = 3,804,753,566.78
  5. Step 5: Solve for x
    x = 3,804,753,566.78/57,940.29
  6. Step 6: Final answer
    x = 65,666.81

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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.