Home / 187.58-281.31-65.81

Finding the Fourth Proportional to 187.58, 281.31 and 65.81

Calculator

Solution

The fourth proportional to 187.58, 281.31 and 65.81 is: 98.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.58 : 281.31 = 65.81 : x
  2. Step 2: Convert to fraction form
    187.58/281.31 = 65.81/x
  3. Step 3: Cross multiply
    187.58x = 281.31 × 65.81
  4. Step 4: Simplify right side
    187.58x = 18,513.47
  5. Step 5: Solve for x
    x = 18,513.47/187.58
  6. Step 6: Final answer
    x = 98.70

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.