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Finding the Fourth Proportional to 207,978.76, 311,968.15 and 67,737.39

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Solution

The fourth proportional to 207,978.76, 311,968.15 and 67,737.39 is: 101,606.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,978.76 : 311,968.15 = 67,737.39 : x
  2. Step 2: Convert to fraction form
    207,978.76/311,968.15 = 67,737.39/x
  3. Step 3: Cross multiply
    207,978.76x = 311,968.15 × 67,737.39
  4. Step 4: Simplify right side
    207,978.76x = 21,131,907,489.84
  5. Step 5: Solve for x
    x = 21,131,907,489.84/207,978.76
  6. Step 6: Final answer
    x = 101,606.08

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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.