Home / 131.75-181.86-80

Finding the Fourth Proportional to 131.75, 181.86 and 80

Calculator

Solution

The fourth proportional to 131.75, 181.86 and 80 is: 110.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.75 : 181.86 = 80 : x
  2. Step 2: Convert to fraction form
    131.75/181.86 = 80/x
  3. Step 3: Cross multiply
    131.75x = 181.86 × 80
  4. Step 4: Simplify right side
    131.75x = 14,548.80
  5. Step 5: Solve for x
    x = 14,548.80/131.75
  6. Step 6: Final answer
    x = 110.43

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.