Home / 128,142-191,163

Finding the Third Proportional to 128,142 and 191,163

Calculator

Solution

The third proportional to 128,142 and 191,163 is: 285,178.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,142 : 191,163 = 191,163 : x
  2. Step 2: Convert to fraction form
    128,142/191,163 = 191,163/x
  3. Step 3: Cross multiply
    128,142x = 191,163 × 191,163
  4. Step 4: Simplify right side
    128,142x = 36,543,292,569
  5. Step 5: Solve for x
    x = 36,543,292,569/128,142
  6. Step 6: Final answer
    x = 285,178.10

Related Problems

Find third proportional to 64,071 and 95,581.50
Half scale
Find third proportional to 256,284 and 382,326
Double scale
Find third proportional to 128,144 and 191,166
Similar ratio
Find third proportional to 192,213 and 286,744.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.