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Finding the Fourth Proportional to 77,769.60, 116,481.60 and 63,945.60

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Solution

The fourth proportional to 77,769.60, 116,481.60 and 63,945.60 is: 95,776.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,769.60 : 116,481.60 = 63,945.60 : x
  2. Step 2: Convert to fraction form
    77,769.60/116,481.60 = 63,945.60/x
  3. Step 3: Cross multiply
    77,769.60x = 116,481.60 × 63,945.60
  4. Step 4: Simplify right side
    77,769.60x = 7,448,485,800.96
  5. Step 5: Solve for x
    x = 7,448,485,800.96/77,769.60
  6. Step 6: Final answer
    x = 95,776.32

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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.