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Finding the Fourth Proportional to 77,126.56, 115,588.72 and 43,861.92

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Solution

The fourth proportional to 77,126.56, 115,588.72 and 43,861.92 is: 65,735.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,126.56 : 115,588.72 = 43,861.92 : x
  2. Step 2: Convert to fraction form
    77,126.56/115,588.72 = 43,861.92/x
  3. Step 3: Cross multiply
    77,126.56x = 115,588.72 × 43,861.92
  4. Step 4: Simplify right side
    77,126.56x = 5,069,943,189.54
  5. Step 5: Solve for x
    x = 5,069,943,189.54/77,126.56
  6. Step 6: Final answer
    x = 65,735.37

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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.