Home / 76.87-115.19-56.48

Finding the Fourth Proportional to 76.87, 115.19 and 56.48

Calculator

Solution

The fourth proportional to 76.87, 115.19 and 56.48 is: 84.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.87 : 115.19 = 56.48 : x
  2. Step 2: Convert to fraction form
    76.87/115.19 = 56.48/x
  3. Step 3: Cross multiply
    76.87x = 115.19 × 56.48
  4. Step 4: Simplify right side
    76.87x = 6,505.65
  5. Step 5: Solve for x
    x = 6,505.65/76.87
  6. Step 6: Final answer
    x = 84.64

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.