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Finding the Fourth Proportional to 69,405.80, 95,769.64 and 39,190.47

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Solution

The fourth proportional to 69,405.80, 95,769.64 and 39,190.47 is: 54,077.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,405.80 : 95,769.64 = 39,190.47 : x
  2. Step 2: Convert to fraction form
    69,405.80/95,769.64 = 39,190.47/x
  3. Step 3: Cross multiply
    69,405.80x = 95,769.64 × 39,190.47
  4. Step 4: Simplify right side
    69,405.80x = 3,753,256,893.18
  5. Step 5: Solve for x
    x = 3,753,256,893.18/69,405.80
  6. Step 6: Final answer
    x = 54,077.00

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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.