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Finding the Fourth Proportional to 251,690.36, 347,328.20 and 136,965.11

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Solution

The fourth proportional to 251,690.36, 347,328.20 and 136,965.11 is: 189,009.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,690.36 : 347,328.20 = 136,965.11 : x
  2. Step 2: Convert to fraction form
    251,690.36/347,328.20 = 136,965.11/x
  3. Step 3: Cross multiply
    251,690.36x = 347,328.20 × 136,965.11
  4. Step 4: Simplify right side
    251,690.36x = 47,571,843,724.87
  5. Step 5: Solve for x
    x = 47,571,843,724.87/251,690.36
  6. Step 6: Final answer
    x = 189,009.40

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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.