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Finding the Fourth Proportional to 69,489.20, 104,080.20 and 53,783.60

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Solution

The fourth proportional to 69,489.20, 104,080.20 and 53,783.60 is: 80,556.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,489.20 : 104,080.20 = 53,783.60 : x
  2. Step 2: Convert to fraction form
    69,489.20/104,080.20 = 53,783.60/x
  3. Step 3: Cross multiply
    69,489.20x = 104,080.20 × 53,783.60
  4. Step 4: Simplify right side
    69,489.20x = 5,597,807,844.72
  5. Step 5: Solve for x
    x = 5,597,807,844.72/69,489.20
  6. Step 6: Final answer
    x = 80,556.52

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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.