Home / 81,735.09-122,622.39-28,419.37

Finding the Fourth Proportional to 81,735.09, 122,622.39 and 28,419.37

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Solution

The fourth proportional to 81,735.09, 122,622.39 and 28,419.37 is: 42,635.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,735.09 : 122,622.39 = 28,419.37 : x
  2. Step 2: Convert to fraction form
    81,735.09/122,622.39 = 28,419.37/x
  3. Step 3: Cross multiply
    81,735.09x = 122,622.39 × 28,419.37
  4. Step 4: Simplify right side
    81,735.09x = 3,484,850,765.14
  5. Step 5: Solve for x
    x = 3,484,850,765.14/81,735.09
  6. Step 6: Final answer
    x = 42,635.92

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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.