Home / 138.72-207.04-134.40

Finding the Fourth Proportional to 138.72, 207.04 and 134.40

Calculator

Solution

The fourth proportional to 138.72, 207.04 and 134.40 is: 200.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.72 : 207.04 = 134.40 : x
  2. Step 2: Convert to fraction form
    138.72/207.04 = 134.40/x
  3. Step 3: Cross multiply
    138.72x = 207.04 × 134.40
  4. Step 4: Simplify right side
    138.72x = 27,826.18
  5. Step 5: Solve for x
    x = 27,826.18/138.72
  6. Step 6: Final answer
    x = 200.59

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.