Home / 118.64-177.72-86.48

Finding the Fourth Proportional to 118.64, 177.72 and 86.48

Calculator

Solution

The fourth proportional to 118.64, 177.72 and 86.48 is: 129.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.64 : 177.72 = 86.48 : x
  2. Step 2: Convert to fraction form
    118.64/177.72 = 86.48/x
  3. Step 3: Cross multiply
    118.64x = 177.72 × 86.48
  4. Step 4: Simplify right side
    118.64x = 15,369.23
  5. Step 5: Solve for x
    x = 15,369.23/118.64
  6. Step 6: Final answer
    x = 129.55

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.