Home / 79-120.50

Finding the Third Proportional to 79 and 120.50

Calculator

Solution

The third proportional to 79 and 120.50 is: 183.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79 : 120.50 = 120.50 : x
  2. Step 2: Convert to fraction form
    79/120.50 = 120.50/x
  3. Step 3: Cross multiply
    79x = 120.50 × 120.50
  4. Step 4: Simplify right side
    79x = 14,520.25
  5. Step 5: Solve for x
    x = 14,520.25/79
  6. Step 6: Final answer
    x = 183.80

Related Problems

Find third proportional to 39.50 and 60.25
Half scale
Find third proportional to 158 and 241
Double scale
Find third proportional to 81 and 124
Similar ratio
Find third proportional to 118.50 and 180.75
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.