Home / 129,087-281,140

Finding the Third Proportional to 129,087 and 281,140

Calculator

Solution

The third proportional to 129,087 and 281,140 is: 612,297.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,087 : 281,140 = 281,140 : x
  2. Step 2: Convert to fraction form
    129,087/281,140 = 281,140/x
  3. Step 3: Cross multiply
    129,087x = 281,140 × 281,140
  4. Step 4: Simplify right side
    129,087x = 79,039,699,600
  5. Step 5: Solve for x
    x = 79,039,699,600/129,087
  6. Step 6: Final answer
    x = 612,297.90

Related Problems

Find third proportional to 64,543.50 and 140,570
Half scale
Find third proportional to 258,174 and 562,280
Double scale
Find third proportional to 129,089 and 281,144
Similar ratio
Find third proportional to 193,630.50 and 421,710
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.