Home / 81,678-122,520

Finding the Third Proportional to 81,678 and 122,520

Calculator

Solution

The third proportional to 81,678 and 122,520 is: 183,784.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,678 : 122,520 = 122,520 : x
  2. Step 2: Convert to fraction form
    81,678/122,520 = 122,520/x
  3. Step 3: Cross multiply
    81,678x = 122,520 × 122,520
  4. Step 4: Simplify right side
    81,678x = 15,011,150,400
  5. Step 5: Solve for x
    x = 15,011,150,400/81,678
  6. Step 6: Final answer
    x = 183,784.50

Related Problems

Find third proportional to 40,839 and 61,260
Half scale
Find third proportional to 163,356 and 245,040
Double scale
Find third proportional to 81,680 and 122,523
Similar ratio
Find third proportional to 122,517 and 183,780
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.