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Finding the Fourth Proportional to 40,551.20, 60,807.36 and 20,819.60

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Solution

The fourth proportional to 40,551.20, 60,807.36 and 20,819.60 is: 31,219.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,551.20 : 60,807.36 = 20,819.60 : x
  2. Step 2: Convert to fraction form
    40,551.20/60,807.36 = 20,819.60/x
  3. Step 3: Cross multiply
    40,551.20x = 60,807.36 × 20,819.60
  4. Step 4: Simplify right side
    40,551.20x = 1,265,984,912.26
  5. Step 5: Solve for x
    x = 1,265,984,912.26/40,551.20
  6. Step 6: Final answer
    x = 31,219.42

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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.