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Finding the Fourth Proportional to 67,043.88, 100,570.62 and 20,300.40

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Solution

The fourth proportional to 67,043.88, 100,570.62 and 20,300.40 is: 30,452.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,043.88 : 100,570.62 = 20,300.40 : x
  2. Step 2: Convert to fraction form
    67,043.88/100,570.62 = 20,300.40/x
  3. Step 3: Cross multiply
    67,043.88x = 100,570.62 × 20,300.40
  4. Step 4: Simplify right side
    67,043.88x = 2,041,623,814.25
  5. Step 5: Solve for x
    x = 2,041,623,814.25/67,043.88
  6. Step 6: Final answer
    x = 30,452.05

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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.