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Finding the Fourth Proportional to 199,917.78, 299,728.44 and 121,014.06

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Solution

The fourth proportional to 199,917.78, 299,728.44 and 121,014.06 is: 181,431.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,917.78 : 299,728.44 = 121,014.06 : x
  2. Step 2: Convert to fraction form
    199,917.78/299,728.44 = 121,014.06/x
  3. Step 3: Cross multiply
    199,917.78x = 299,728.44 × 121,014.06
  4. Step 4: Simplify right side
    199,917.78x = 36,271,355,421.87
  5. Step 5: Solve for x
    x = 36,271,355,421.87/199,917.78
  6. Step 6: Final answer
    x = 181,431.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.