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Finding the Fourth Proportional to 186,989.59, 280,317.88 and 68,633.47

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Solution

The fourth proportional to 186,989.59, 280,317.88 and 68,633.47 is: 102,889.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,989.59 : 280,317.88 = 68,633.47 : x
  2. Step 2: Convert to fraction form
    186,989.59/280,317.88 = 68,633.47/x
  3. Step 3: Cross multiply
    186,989.59x = 280,317.88 × 68,633.47
  4. Step 4: Simplify right side
    186,989.59x = 19,239,188,807.44
  5. Step 5: Solve for x
    x = 19,239,188,807.44/186,989.59
  6. Step 6: Final answer
    x = 102,889.09

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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.