Home / 103.84-143.31-77.92

Finding the Fourth Proportional to 103.84, 143.31 and 77.92

Calculator

Solution

The fourth proportional to 103.84, 143.31 and 77.92 is: 107.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.84 : 143.31 = 77.92 : x
  2. Step 2: Convert to fraction form
    103.84/143.31 = 77.92/x
  3. Step 3: Cross multiply
    103.84x = 143.31 × 77.92
  4. Step 4: Simplify right side
    103.84x = 11,166.72
  5. Step 5: Solve for x
    x = 11,166.72/103.84
  6. Step 6: Final answer
    x = 107.54

Related Problems

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.