Home / 78,228-121,200

Finding the Third Proportional to 78,228 and 121,200

Calculator

Solution

The third proportional to 78,228 and 121,200 is: 187,777.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,228 : 121,200 = 121,200 : x
  2. Step 2: Convert to fraction form
    78,228/121,200 = 121,200/x
  3. Step 3: Cross multiply
    78,228x = 121,200 × 121,200
  4. Step 4: Simplify right side
    78,228x = 14,689,440,000
  5. Step 5: Solve for x
    x = 14,689,440,000/78,228
  6. Step 6: Final answer
    x = 187,777.27

Related Problems

Find third proportional to 39,114 and 60,600
Half scale
Find third proportional to 156,456 and 242,400
Double scale
Find third proportional to 78,230 and 121,203
Similar ratio
Find third proportional to 117,342 and 181,800
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.