Home / 171.78-237.27-142.40

Finding the Fourth Proportional to 171.78, 237.27 and 142.40

Calculator

Solution

The fourth proportional to 171.78, 237.27 and 142.40 is: 196.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.78 : 237.27 = 142.40 : x
  2. Step 2: Convert to fraction form
    171.78/237.27 = 142.40/x
  3. Step 3: Cross multiply
    171.78x = 237.27 × 142.40
  4. Step 4: Simplify right side
    171.78x = 33,786.06
  5. Step 5: Solve for x
    x = 33,786.06/171.78
  6. Step 6: Final answer
    x = 196.68

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.