Home / 59.91-77.20

Finding the Third Proportional to 59.91 and 77.20

Calculator

Solution

The third proportional to 59.91 and 77.20 is: 99.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.91 : 77.20 = 77.20 : x
  2. Step 2: Convert to fraction form
    59.91/77.20 = 77.20/x
  3. Step 3: Cross multiply
    59.91x = 77.20 × 77.20
  4. Step 4: Simplify right side
    59.91x = 5,960.32
  5. Step 5: Solve for x
    x = 5,960.32/59.91
  6. Step 6: Final answer
    x = 99.49

Related Problems

Find third proportional to 29.95 and 38.60
Half scale
Find third proportional to 119.81 and 154.41
Double scale
Find third proportional to 62 and 80
Similar ratio
Find third proportional to 89.86 and 115.80
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.