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Finding the Fourth Proportional to 173,860.20, 260,963.10 and 85,213.80

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Solution

The fourth proportional to 173,860.20, 260,963.10 and 85,213.80 is: 127,905.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,860.20 : 260,963.10 = 85,213.80 : x
  2. Step 2: Convert to fraction form
    173,860.20/260,963.10 = 85,213.80/x
  3. Step 3: Cross multiply
    173,860.20x = 260,963.10 × 85,213.80
  4. Step 4: Simplify right side
    173,860.20x = 22,237,657,410.78
  5. Step 5: Solve for x
    x = 22,237,657,410.78/173,860.20
  6. Step 6: Final answer
    x = 127,905.39

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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.