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Finding the Fourth Proportional to 217,091.90, 299,578.14 and 121,593.71

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Solution

The fourth proportional to 217,091.90, 299,578.14 and 121,593.71 is: 167,794.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,091.90 : 299,578.14 = 121,593.71 : x
  2. Step 2: Convert to fraction form
    217,091.90/299,578.14 = 121,593.71/x
  3. Step 3: Cross multiply
    217,091.90x = 299,578.14 × 121,593.71
  4. Step 4: Simplify right side
    217,091.90x = 36,426,815,979.61
  5. Step 5: Solve for x
    x = 36,426,815,979.61/217,091.90
  6. Step 6: Final answer
    x = 167,794.45

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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.