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Finding the Fourth Proportional to 104,296.80, 143,876.60 and 65,991.80

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Solution

The fourth proportional to 104,296.80, 143,876.60 and 65,991.80 is: 91,035.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,296.80 : 143,876.60 = 65,991.80 : x
  2. Step 2: Convert to fraction form
    104,296.80/143,876.60 = 65,991.80/x
  3. Step 3: Cross multiply
    104,296.80x = 143,876.60 × 65,991.80
  4. Step 4: Simplify right side
    104,296.80x = 9,494,675,811.88
  5. Step 5: Solve for x
    x = 9,494,675,811.88/104,296.80
  6. Step 6: Final answer
    x = 91,035.16

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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.