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Finding the Fourth Proportional to 40,120.80, 60,181.20 and 13,816.80

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Solution

The fourth proportional to 40,120.80, 60,181.20 and 13,816.80 is: 20,725.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,120.80 : 60,181.20 = 13,816.80 : x
  2. Step 2: Convert to fraction form
    40,120.80/60,181.20 = 13,816.80/x
  3. Step 3: Cross multiply
    40,120.80x = 60,181.20 × 13,816.80
  4. Step 4: Simplify right side
    40,120.80x = 831,511,604.16
  5. Step 5: Solve for x
    x = 831,511,604.16/40,120.80
  6. Step 6: Final answer
    x = 20,725.20

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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.