Home / 81,140.43-121,709.33-31,231.37

Finding the Fourth Proportional to 81,140.43, 121,709.33 and 31,231.37

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Solution

The fourth proportional to 81,140.43, 121,709.33 and 31,231.37 is: 46,846.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,140.43 : 121,709.33 = 31,231.37 : x
  2. Step 2: Convert to fraction form
    81,140.43/121,709.33 = 31,231.37/x
  3. Step 3: Cross multiply
    81,140.43x = 121,709.33 × 31,231.37
  4. Step 4: Simplify right side
    81,140.43x = 3,801,148,352.98
  5. Step 5: Solve for x
    x = 3,801,148,352.98/81,140.43
  6. Step 6: Final answer
    x = 46,846.54

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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.