Home / 81,431.60-122,162.75-30,845.77

Finding the Fourth Proportional to 81,431.60, 122,162.75 and 30,845.77

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Solution

The fourth proportional to 81,431.60, 122,162.75 and 30,845.77 is: 46,274.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,431.60 : 122,162.75 = 30,845.77 : x
  2. Step 2: Convert to fraction form
    81,431.60/122,162.75 = 30,845.77/x
  3. Step 3: Cross multiply
    81,431.60x = 122,162.75 × 30,845.77
  4. Step 4: Simplify right side
    81,431.60x = 3,768,203,745.10
  5. Step 5: Solve for x
    x = 3,768,203,745.10/81,431.60
  6. Step 6: Final answer
    x = 46,274.47

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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.