Home / 208,566.69-312,731.19-82,138.47

Finding the Fourth Proportional to 208,566.69, 312,731.19 and 82,138.47

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Solution

The fourth proportional to 208,566.69, 312,731.19 and 82,138.47 is: 123,160.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,566.69 : 312,731.19 = 82,138.47 : x
  2. Step 2: Convert to fraction form
    208,566.69/312,731.19 = 82,138.47/x
  3. Step 3: Cross multiply
    208,566.69x = 312,731.19 × 82,138.47
  4. Step 4: Simplify right side
    208,566.69x = 25,687,261,467.88
  5. Step 5: Solve for x
    x = 25,687,261,467.88/208,566.69
  6. Step 6: Final answer
    x = 123,160.90

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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.