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Finding the Fourth Proportional to 156,640.49, 216,158.09 and 85,018.98

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Solution

The fourth proportional to 156,640.49, 216,158.09 and 85,018.98 is: 117,323.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,640.49 : 216,158.09 = 85,018.98 : x
  2. Step 2: Convert to fraction form
    156,640.49/216,158.09 = 85,018.98/x
  3. Step 3: Cross multiply
    156,640.49x = 216,158.09 × 85,018.98
  4. Step 4: Simplify right side
    156,640.49x = 18,377,538,824.66
  5. Step 5: Solve for x
    x = 18,377,538,824.66/156,640.49
  6. Step 6: Final answer
    x = 117,323.04

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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.