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Finding the Fourth Proportional to 70,625.88, 97,439.94 and 39,994.80

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Solution

The fourth proportional to 70,625.88, 97,439.94 and 39,994.80 is: 55,179.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,625.88 : 97,439.94 = 39,994.80 : x
  2. Step 2: Convert to fraction form
    70,625.88/97,439.94 = 39,994.80/x
  3. Step 3: Cross multiply
    70,625.88x = 97,439.94 × 39,994.80
  4. Step 4: Simplify right side
    70,625.88x = 3,897,090,912.31
  5. Step 5: Solve for x
    x = 3,897,090,912.31/70,625.88
  6. Step 6: Final answer
    x = 55,179.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.