Home / 208,122.54-312,057.36-81,611.19

Finding the Fourth Proportional to 208,122.54, 312,057.36 and 81,611.19

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Solution

The fourth proportional to 208,122.54, 312,057.36 and 81,611.19 is: 122,367.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,122.54 : 312,057.36 = 81,611.19 : x
  2. Step 2: Convert to fraction form
    208,122.54/312,057.36 = 81,611.19/x
  3. Step 3: Cross multiply
    208,122.54x = 312,057.36 × 81,611.19
  4. Step 4: Simplify right side
    208,122.54x = 25,467,372,497.86
  5. Step 5: Solve for x
    x = 25,467,372,497.86/208,122.54
  6. Step 6: Final answer
    x = 122,367.20

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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.