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Finding the Fourth Proportional to 206,879.31, 310,343.28 and 73,778.49

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Solution

The fourth proportional to 206,879.31, 310,343.28 and 73,778.49 is: 110,676.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,879.31 : 310,343.28 = 73,778.49 : x
  2. Step 2: Convert to fraction form
    206,879.31/310,343.28 = 73,778.49/x
  3. Step 3: Cross multiply
    206,879.31x = 310,343.28 × 73,778.49
  4. Step 4: Simplify right side
    206,879.31x = 22,896,658,580.05
  5. Step 5: Solve for x
    x = 22,896,658,580.05/206,879.31
  6. Step 6: Final answer
    x = 110,676.41

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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.