Home / 70.71-105.90-43.61

Finding the Fourth Proportional to 70.71, 105.90 and 43.61

Calculator

Solution

The fourth proportional to 70.71, 105.90 and 43.61 is: 65.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.71 : 105.90 = 43.61 : x
  2. Step 2: Convert to fraction form
    70.71/105.90 = 43.61/x
  3. Step 3: Cross multiply
    70.71x = 105.90 × 43.61
  4. Step 4: Simplify right side
    70.71x = 4,617.77
  5. Step 5: Solve for x
    x = 4,617.77/70.71
  6. Step 6: Final answer
    x = 65.31

Related Problems

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.