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Finding the Fourth Proportional to 69,432.80, 104,003.40 and 38,231.60

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Solution

The fourth proportional to 69,432.80, 104,003.40 and 38,231.60 is: 57,267.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,432.80 : 104,003.40 = 38,231.60 : x
  2. Step 2: Convert to fraction form
    69,432.80/104,003.40 = 38,231.60/x
  3. Step 3: Cross multiply
    69,432.80x = 104,003.40 × 38,231.60
  4. Step 4: Simplify right side
    69,432.80x = 3,976,216,387.44
  5. Step 5: Solve for x
    x = 3,976,216,387.44/69,432.80
  6. Step 6: Final answer
    x = 57,267.12

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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.