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Finding the Fourth Proportional to 170,805.38, 256,364.29 and 86,623.63

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Solution

The fourth proportional to 170,805.38, 256,364.29 and 86,623.63 is: 130,014.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,805.38 : 256,364.29 = 86,623.63 : x
  2. Step 2: Convert to fraction form
    170,805.38/256,364.29 = 86,623.63/x
  3. Step 3: Cross multiply
    170,805.38x = 256,364.29 × 86,623.63
  4. Step 4: Simplify right side
    170,805.38x = 22,207,204,869.54
  5. Step 5: Solve for x
    x = 22,207,204,869.54/170,805.38
  6. Step 6: Final answer
    x = 130,014.67

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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.