Home / 78.20-116.93-70.10

Finding the Fourth Proportional to 78.20, 116.93 and 70.10

Calculator

Solution

The fourth proportional to 78.20, 116.93 and 70.10 is: 104.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78.20 : 116.93 = 70.10 : x
  2. Step 2: Convert to fraction form
    78.20/116.93 = 70.10/x
  3. Step 3: Cross multiply
    78.20x = 116.93 × 70.10
  4. Step 4: Simplify right side
    78.20x = 8,196.38
  5. Step 5: Solve for x
    x = 8,196.38/78.20
  6. Step 6: Final answer
    x = 104.82

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.