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Finding the Fourth Proportional to 156,639.80, 216,163.41 and 85,020.41

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Solution

The fourth proportional to 156,639.80, 216,163.41 and 85,020.41 is: 117,328.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,639.80 : 216,163.41 = 85,020.41 : x
  2. Step 2: Convert to fraction form
    156,639.80/216,163.41 = 85,020.41/x
  3. Step 3: Cross multiply
    156,639.80x = 216,163.41 × 85,020.41
  4. Step 4: Simplify right side
    156,639.80x = 18,378,301,745.20
  5. Step 5: Solve for x
    x = 18,378,301,745.20/156,639.80
  6. Step 6: Final answer
    x = 117,328.43

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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.