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Finding the Fourth Proportional to 171,690.30, 257,644.80 and 100,612.80

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Solution

The fourth proportional to 171,690.30, 257,644.80 and 100,612.80 is: 150,983.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,690.30 : 257,644.80 = 100,612.80 : x
  2. Step 2: Convert to fraction form
    171,690.30/257,644.80 = 100,612.80/x
  3. Step 3: Cross multiply
    171,690.30x = 257,644.80 × 100,612.80
  4. Step 4: Simplify right side
    171,690.30x = 25,922,364,733.44
  5. Step 5: Solve for x
    x = 25,922,364,733.44/171,690.30
  6. Step 6: Final answer
    x = 150,983.28

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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.