Home / 128,068-205,771

Finding the Third Proportional to 128,068 and 205,771

Calculator

Solution

The third proportional to 128,068 and 205,771 is: 330,618.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,068 : 205,771 = 205,771 : x
  2. Step 2: Convert to fraction form
    128,068/205,771 = 205,771/x
  3. Step 3: Cross multiply
    128,068x = 205,771 × 205,771
  4. Step 4: Simplify right side
    128,068x = 42,341,704,441
  5. Step 5: Solve for x
    x = 42,341,704,441/128,068
  6. Step 6: Final answer
    x = 330,618.92

Related Problems

Find third proportional to 64,034 and 102,885.50
Half scale
Find third proportional to 256,136 and 411,542
Double scale
Find third proportional to 128,070 and 205,774
Similar ratio
Find third proportional to 192,102 and 308,656.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.