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Finding the Fourth Proportional to 137,994.30, 206,991.45 and 124,872.30

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Solution

The fourth proportional to 137,994.30, 206,991.45 and 124,872.30 is: 187,308.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,994.30 : 206,991.45 = 124,872.30 : x
  2. Step 2: Convert to fraction form
    137,994.30/206,991.45 = 124,872.30/x
  3. Step 3: Cross multiply
    137,994.30x = 206,991.45 × 124,872.30
  4. Step 4: Simplify right side
    137,994.30x = 25,847,498,441.84
  5. Step 5: Solve for x
    x = 25,847,498,441.84/137,994.30
  6. Step 6: Final answer
    x = 187,308.45

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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.