Home / 78.39-108.16-50.76

Finding the Fourth Proportional to 78.39, 108.16 and 50.76

Calculator

Solution

The fourth proportional to 78.39, 108.16 and 50.76 is: 70.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78.39 : 108.16 = 50.76 : x
  2. Step 2: Convert to fraction form
    78.39/108.16 = 50.76/x
  3. Step 3: Cross multiply
    78.39x = 108.16 × 50.76
  4. Step 4: Simplify right side
    78.39x = 5,490.07
  5. Step 5: Solve for x
    x = 5,490.07/78.39
  6. Step 6: Final answer
    x = 70.04

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.