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Finding the Fourth Proportional to 170,156.81, 255,393.03 and 85,976.09

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Solution

The fourth proportional to 170,156.81, 255,393.03 and 85,976.09 is: 129,043.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,156.81 : 255,393.03 = 85,976.09 : x
  2. Step 2: Convert to fraction form
    170,156.81/255,393.03 = 85,976.09/x
  3. Step 3: Cross multiply
    170,156.81x = 255,393.03 × 85,976.09
  4. Step 4: Simplify right side
    170,156.81x = 21,957,695,572.41
  5. Step 5: Solve for x
    x = 21,957,695,572.41/170,156.81
  6. Step 6: Final answer
    x = 129,043.88

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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.