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Finding the Fourth Proportional to 185,409.05, 277,919.65 and 85,634.69

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Solution

The fourth proportional to 185,409.05, 277,919.65 and 85,634.69 is: 128,362.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,409.05 : 277,919.65 = 85,634.69 : x
  2. Step 2: Convert to fraction form
    185,409.05/277,919.65 = 85,634.69/x
  3. Step 3: Cross multiply
    185,409.05x = 277,919.65 × 85,634.69
  4. Step 4: Simplify right side
    185,409.05x = 23,799,563,072.66
  5. Step 5: Solve for x
    x = 23,799,563,072.66/185,409.05
  6. Step 6: Final answer
    x = 128,362.47

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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.