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Finding the Fourth Proportional to 139,057.58, 208,586.35 and 39,204.73

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Solution

The fourth proportional to 139,057.58, 208,586.35 and 39,204.73 is: 58,807.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,057.58 : 208,586.35 = 39,204.73 : x
  2. Step 2: Convert to fraction form
    139,057.58/208,586.35 = 39,204.73/x
  3. Step 3: Cross multiply
    139,057.58x = 208,586.35 × 39,204.73
  4. Step 4: Simplify right side
    139,057.58x = 8,177,571,533.44
  5. Step 5: Solve for x
    x = 8,177,571,533.44/139,057.58
  6. Step 6: Final answer
    x = 58,807.09

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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.