Home / 125.00-172.37-87.69

Finding the Fourth Proportional to 125.00, 172.37 and 87.69

Calculator

Solution

The fourth proportional to 125.00, 172.37 and 87.69 is: 120.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.00 : 172.37 = 87.69 : x
  2. Step 2: Convert to fraction form
    125.00/172.37 = 87.69/x
  3. Step 3: Cross multiply
    125.00x = 172.37 × 87.69
  4. Step 4: Simplify right side
    125.00x = 15,114.53
  5. Step 5: Solve for x
    x = 15,114.53/125.00
  6. Step 6: Final answer
    x = 120.92

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.