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Finding the Fourth Proportional to 156,640.52, 216,164.06 and 85,020.52

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Solution

The fourth proportional to 156,640.52, 216,164.06 and 85,020.52 is: 117,328.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,640.52 : 216,164.06 = 85,020.52 : x
  2. Step 2: Convert to fraction form
    156,640.52/216,164.06 = 85,020.52/x
  3. Step 3: Cross multiply
    156,640.52x = 216,164.06 × 85,020.52
  4. Step 4: Simplify right side
    156,640.52x = 18,378,380,786.51
  5. Step 5: Solve for x
    x = 18,378,380,786.51/156,640.52
  6. Step 6: Final answer
    x = 117,328.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.