Home / 118.78-178.08-64.65

Finding the Fourth Proportional to 118.78, 178.08 and 64.65

Calculator

Solution

The fourth proportional to 118.78, 178.08 and 64.65 is: 96.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.78 : 178.08 = 64.65 : x
  2. Step 2: Convert to fraction form
    118.78/178.08 = 64.65/x
  3. Step 3: Cross multiply
    118.78x = 178.08 × 64.65
  4. Step 4: Simplify right side
    118.78x = 11,512.87
  5. Step 5: Solve for x
    x = 11,512.87/118.78
  6. Step 6: Final answer
    x = 96.93

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.