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Finding the Fourth Proportional to 121,761.66, 168,027.75 and 68,047.05

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Solution

The fourth proportional to 121,761.66, 168,027.75 and 68,047.05 is: 93,903.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,761.66 : 168,027.75 = 68,047.05 : x
  2. Step 2: Convert to fraction form
    121,761.66/168,027.75 = 68,047.05/x
  3. Step 3: Cross multiply
    121,761.66x = 168,027.75 × 68,047.05
  4. Step 4: Simplify right side
    121,761.66x = 11,433,792,705.64
  5. Step 5: Solve for x
    x = 11,433,792,705.64/121,761.66
  6. Step 6: Final answer
    x = 93,903.06

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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.