Home / 136.69-243

Finding the Third Proportional to 136.69 and 243

Calculator

Solution

The third proportional to 136.69 and 243 is: 432

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.69 : 243 = 243 : x
  2. Step 2: Convert to fraction form
    136.69/243 = 243/x
  3. Step 3: Cross multiply
    136.69x = 243 × 243
  4. Step 4: Simplify right side
    136.69x = 59,049
  5. Step 5: Solve for x
    x = 59,049/136.69
  6. Step 6: Final answer
    x = 432

Related Problems

Find third proportional to 68.34 and 121.50
Half scale
Find third proportional to 273.38 and 486
Double scale
Find third proportional to 139 and 247
Similar ratio
Find third proportional to 205.03 and 364.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.