Home / 81,138-109,203

Finding the Third Proportional to 81,138 and 109,203

Calculator

Solution

The third proportional to 81,138 and 109,203 is: 146,975.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,138 : 109,203 = 109,203 : x
  2. Step 2: Convert to fraction form
    81,138/109,203 = 109,203/x
  3. Step 3: Cross multiply
    81,138x = 109,203 × 109,203
  4. Step 4: Simplify right side
    81,138x = 11,925,295,209
  5. Step 5: Solve for x
    x = 11,925,295,209/81,138
  6. Step 6: Final answer
    x = 146,975.46

Related Problems

Find third proportional to 40,569 and 54,601.50
Half scale
Find third proportional to 162,276 and 218,406
Double scale
Find third proportional to 81,140 and 109,206
Similar ratio
Find third proportional to 121,707 and 163,804.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.