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Finding the Fourth Proportional to 171,145.19, 256,843.91 and 81,188.18

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Solution

The fourth proportional to 171,145.19, 256,843.91 and 81,188.18 is: 121,842.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,145.19 : 256,843.91 = 81,188.18 : x
  2. Step 2: Convert to fraction form
    171,145.19/256,843.91 = 81,188.18/x
  3. Step 3: Cross multiply
    171,145.19x = 256,843.91 × 81,188.18
  4. Step 4: Simplify right side
    171,145.19x = 20,852,689,596.98
  5. Step 5: Solve for x
    x = 20,852,689,596.98/171,145.19
  6. Step 6: Final answer
    x = 121,842.10

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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.