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Finding the Fourth Proportional to 121,812.66, 168,109.83 and 68,096.70

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Solution

The fourth proportional to 121,812.66, 168,109.83 and 68,096.70 is: 93,978.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,812.66 : 168,109.83 = 68,096.70 : x
  2. Step 2: Convert to fraction form
    121,812.66/168,109.83 = 68,096.70/x
  3. Step 3: Cross multiply
    121,812.66x = 168,109.83 × 68,096.70
  4. Step 4: Simplify right side
    121,812.66x = 11,447,724,660.56
  5. Step 5: Solve for x
    x = 11,447,724,660.56/121,812.66
  6. Step 6: Final answer
    x = 93,978.12

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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.