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Finding the Fourth Proportional to 104,991.72, 144,889.26 and 57,245.88

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Solution

The fourth proportional to 104,991.72, 144,889.26 and 57,245.88 is: 78,999.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,991.72 : 144,889.26 = 57,245.88 : x
  2. Step 2: Convert to fraction form
    104,991.72/144,889.26 = 57,245.88/x
  3. Step 3: Cross multiply
    104,991.72x = 144,889.26 × 57,245.88
  4. Step 4: Simplify right side
    104,991.72x = 8,294,313,191.25
  5. Step 5: Solve for x
    x = 8,294,313,191.25/104,991.72
  6. Step 6: Final answer
    x = 78,999.69

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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.