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Finding the Fourth Proportional to 69,138.80, 103,724.64 and 22,391.60

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Solution

The fourth proportional to 69,138.80, 103,724.64 and 22,391.60 is: 33,592.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,138.80 : 103,724.64 = 22,391.60 : x
  2. Step 2: Convert to fraction form
    69,138.80/103,724.64 = 22,391.60/x
  3. Step 3: Cross multiply
    69,138.80x = 103,724.64 × 22,391.60
  4. Step 4: Simplify right side
    69,138.80x = 2,322,560,649.02
  5. Step 5: Solve for x
    x = 2,322,560,649.02/69,138.80
  6. Step 6: Final answer
    x = 33,592.72

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1.5x scale

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.