Home / 156.68-216.16-91.16

Finding the Fourth Proportional to 156.68, 216.16 and 91.16

Calculator

Solution

The fourth proportional to 156.68, 216.16 and 91.16 is: 125.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.68 : 216.16 = 91.16 : x
  2. Step 2: Convert to fraction form
    156.68/216.16 = 91.16/x
  3. Step 3: Cross multiply
    156.68x = 216.16 × 91.16
  4. Step 4: Simplify right side
    156.68x = 19,705.15
  5. Step 5: Solve for x
    x = 19,705.15/156.68
  6. Step 6: Final answer
    x = 125.77

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.