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Finding the Fourth Proportional to 128,769.52, 193,207.43 and 69,535.44

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Solution

The fourth proportional to 128,769.52, 193,207.43 and 69,535.44 is: 104,331.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,769.52 : 193,207.43 = 69,535.44 : x
  2. Step 2: Convert to fraction form
    128,769.52/193,207.43 = 69,535.44/x
  3. Step 3: Cross multiply
    128,769.52x = 193,207.43 × 69,535.44
  4. Step 4: Simplify right side
    128,769.52x = 13,434,763,173.30
  5. Step 5: Solve for x
    x = 13,434,763,173.30/128,769.52
  6. Step 6: Final answer
    x = 104,331.86

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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.