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Finding the Fourth Proportional to 170,806.70, 256,366.78 and 86,625.42

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Solution

The fourth proportional to 170,806.70, 256,366.78 and 86,625.42 is: 130,017.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,806.70 : 256,366.78 = 86,625.42 : x
  2. Step 2: Convert to fraction form
    170,806.70/256,366.78 = 86,625.42/x
  3. Step 3: Cross multiply
    170,806.70x = 256,366.78 × 86,625.42
  4. Step 4: Simplify right side
    170,806.70x = 22,207,879,991.55
  5. Step 5: Solve for x
    x = 22,207,879,991.55/170,806.70
  6. Step 6: Final answer
    x = 130,017.62

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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.