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Finding the Fourth Proportional to 40,105.45, 60,137.40 and 21,380.45

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Solution

The fourth proportional to 40,105.45, 60,137.40 and 21,380.45 is: 32,059.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,105.45 : 60,137.40 = 21,380.45 : x
  2. Step 2: Convert to fraction form
    40,105.45/60,137.40 = 21,380.45/x
  3. Step 3: Cross multiply
    40,105.45x = 60,137.40 × 21,380.45
  4. Step 4: Simplify right side
    40,105.45x = 1,285,764,673.83
  5. Step 5: Solve for x
    x = 1,285,764,673.83/40,105.45
  6. Step 6: Final answer
    x = 32,059.60

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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.