Home / 71.78-107.63-29.02

Finding the Fourth Proportional to 71.78, 107.63 and 29.02

Calculator

Solution

The fourth proportional to 71.78, 107.63 and 29.02 is: 43.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.78 : 107.63 = 29.02 : x
  2. Step 2: Convert to fraction form
    71.78/107.63 = 29.02/x
  3. Step 3: Cross multiply
    71.78x = 107.63 × 29.02
  4. Step 4: Simplify right side
    71.78x = 3,123.42
  5. Step 5: Solve for x
    x = 3,123.42/71.78
  6. Step 6: Final answer
    x = 43.51

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.