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Finding the Fourth Proportional to 210,891.69, 315,940.23 and 104,150.70

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Solution

The fourth proportional to 210,891.69, 315,940.23 and 104,150.70 is: 156,029.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,891.69 : 315,940.23 = 104,150.70 : x
  2. Step 2: Convert to fraction form
    210,891.69/315,940.23 = 104,150.70/x
  3. Step 3: Cross multiply
    210,891.69x = 315,940.23 × 104,150.70
  4. Step 4: Simplify right side
    210,891.69x = 32,905,396,112.66
  5. Step 5: Solve for x
    x = 32,905,396,112.66/210,891.69
  6. Step 6: Final answer
    x = 156,029.84

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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.