Home / 83.75-138.13

Finding the Third Proportional to 83.75 and 138.13

Calculator

Solution

The third proportional to 83.75 and 138.13 is: 227.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.75 : 138.13 = 138.13 : x
  2. Step 2: Convert to fraction form
    83.75/138.13 = 138.13/x
  3. Step 3: Cross multiply
    83.75x = 138.13 × 138.13
  4. Step 4: Simplify right side
    83.75x = 19,078.52
  5. Step 5: Solve for x
    x = 19,078.52/83.75
  6. Step 6: Final answer
    x = 227.80

Related Problems

Find third proportional to 41.88 and 69.06
Half scale
Find third proportional to 167.50 and 276.25
Double scale
Find third proportional to 86 and 141
Similar ratio
Find third proportional to 125.63 and 207.19
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.65) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.