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Finding the Fourth Proportional to 188,172.22, 259,893.20 and 123,928.66

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Solution

The fourth proportional to 188,172.22, 259,893.20 and 123,928.66 is: 171,163.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,172.22 : 259,893.20 = 123,928.66 : x
  2. Step 2: Convert to fraction form
    188,172.22/259,893.20 = 123,928.66/x
  3. Step 3: Cross multiply
    188,172.22x = 259,893.20 × 123,928.66
  4. Step 4: Simplify right side
    188,172.22x = 32,208,216,019.11
  5. Step 5: Solve for x
    x = 32,208,216,019.11/188,172.22
  6. Step 6: Final answer
    x = 171,163.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.