Home / 73-87

Finding the Third Proportional to 73 and 87

Calculator

Solution

The third proportional to 73 and 87 is: 103.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    73 : 87 = 87 : x
  2. Step 2: Convert to fraction form
    73/87 = 87/x
  3. Step 3: Cross multiply
    73x = 87 × 87
  4. Step 4: Simplify right side
    73x = 7,569
  5. Step 5: Solve for x
    x = 7,569/73
  6. Step 6: Final answer
    x = 103.68

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.