Home / 190.05-285.09-81.84

Finding the Fourth Proportional to 190.05, 285.09 and 81.84

Calculator

Solution

The fourth proportional to 190.05, 285.09 and 81.84 is: 122.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.05 : 285.09 = 81.84 : x
  2. Step 2: Convert to fraction form
    190.05/285.09 = 81.84/x
  3. Step 3: Cross multiply
    190.05x = 285.09 × 81.84
  4. Step 4: Simplify right side
    190.05x = 23,332.53
  5. Step 5: Solve for x
    x = 23,332.53/190.05
  6. Step 6: Final answer
    x = 122.77

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.