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Finding the Fourth Proportional to 121,905.59, 168,237.14 and 68,194.22

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Solution

The fourth proportional to 121,905.59, 168,237.14 and 68,194.22 is: 94,112.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,905.59 : 168,237.14 = 68,194.22 : x
  2. Step 2: Convert to fraction form
    121,905.59/168,237.14 = 68,194.22/x
  3. Step 3: Cross multiply
    121,905.59x = 168,237.14 × 68,194.22
  4. Step 4: Simplify right side
    121,905.59x = 11,472,799,355.17
  5. Step 5: Solve for x
    x = 11,472,799,355.17/121,905.59
  6. Step 6: Final answer
    x = 94,112.17

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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.