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Finding the Fourth Proportional to 57,139.56, 78,891.56 and 35,637.68

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Solution

The fourth proportional to 57,139.56, 78,891.56 and 35,637.68 is: 49,204.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,139.56 : 78,891.56 = 35,637.68 : x
  2. Step 2: Convert to fraction form
    57,139.56/78,891.56 = 35,637.68/x
  3. Step 3: Cross multiply
    57,139.56x = 78,891.56 × 35,637.68
  4. Step 4: Simplify right side
    57,139.56x = 2,811,512,169.98
  5. Step 5: Solve for x
    x = 2,811,512,169.98/57,139.56
  6. Step 6: Final answer
    x = 49,204.30

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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.