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Finding the Fourth Proportional to 121,996.71, 168,356.31 and 68,286.69

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Solution

The fourth proportional to 121,996.71, 168,356.31 and 68,286.69 is: 94,236.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,996.71 : 168,356.31 = 68,286.69 : x
  2. Step 2: Convert to fraction form
    121,996.71/168,356.31 = 68,286.69/x
  3. Step 3: Cross multiply
    121,996.71x = 168,356.31 × 68,286.69
  4. Step 4: Simplify right side
    121,996.71x = 11,496,495,150.51
  5. Step 5: Solve for x
    x = 11,496,495,150.51/121,996.71
  6. Step 6: Final answer
    x = 94,236.11

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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.