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Finding the Fourth Proportional to 271,800.80, 407,701.20 and 72,120.80

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Solution

The fourth proportional to 271,800.80, 407,701.20 and 72,120.80 is: 108,181.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,800.80 : 407,701.20 = 72,120.80 : x
  2. Step 2: Convert to fraction form
    271,800.80/407,701.20 = 72,120.80/x
  3. Step 3: Cross multiply
    271,800.80x = 407,701.20 × 72,120.80
  4. Step 4: Simplify right side
    271,800.80x = 29,403,736,704.96
  5. Step 5: Solve for x
    x = 29,403,736,704.96/271,800.80
  6. Step 6: Final answer
    x = 108,181.20

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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.