Home / 43.31-68.91

Finding the Third Proportional to 43.31 and 68.91

Calculator

Solution

The third proportional to 43.31 and 68.91 is: 109.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.31 : 68.91 = 68.91 : x
  2. Step 2: Convert to fraction form
    43.31/68.91 = 68.91/x
  3. Step 3: Cross multiply
    43.31x = 68.91 × 68.91
  4. Step 4: Simplify right side
    43.31x = 4,748.07
  5. Step 5: Solve for x
    x = 4,748.07/43.31
  6. Step 6: Final answer
    x = 109.62

Related Problems

Find third proportional to 21.66 and 34.45
Half scale
Find third proportional to 86.63 and 137.81
Double scale
Find third proportional to 45 and 72
Similar ratio
Find third proportional to 64.97 and 103.36
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.