Home / 208,261.44-312,181.81-81,990.28

Finding the Fourth Proportional to 208,261.44, 312,181.81 and 81,990.28

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Solution

The fourth proportional to 208,261.44, 312,181.81 and 81,990.28 is: 122,902.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,261.44 : 312,181.81 = 81,990.28 : x
  2. Step 2: Convert to fraction form
    208,261.44/312,181.81 = 81,990.28/x
  3. Step 3: Cross multiply
    208,261.44x = 312,181.81 × 81,990.28
  4. Step 4: Simplify right side
    208,261.44x = 25,595,874,012.81
  5. Step 5: Solve for x
    x = 25,595,874,012.81/208,261.44
  6. Step 6: Final answer
    x = 122,902.61

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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.