Home / 104.34-120.38

Finding the Third Proportional to 104.34 and 120.38

Calculator

Solution

The third proportional to 104.34 and 120.38 is: 138.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.34 : 120.38 = 120.38 : x
  2. Step 2: Convert to fraction form
    104.34/120.38 = 120.38/x
  3. Step 3: Cross multiply
    104.34x = 120.38 × 120.38
  4. Step 4: Simplify right side
    104.34x = 14,490.14
  5. Step 5: Solve for x
    x = 14,490.14/104.34
  6. Step 6: Final answer
    x = 138.87

Related Problems

Find third proportional to 52.17 and 60.19
Half scale
Find third proportional to 208.69 and 240.75
Double scale
Find third proportional to 106 and 123
Similar ratio
Find third proportional to 156.52 and 180.56
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.