Home / 141.31-194.79-99.91

Finding the Fourth Proportional to 141.31, 194.79 and 99.91

Calculator

Solution

The fourth proportional to 141.31, 194.79 and 99.91 is: 137.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.31 : 194.79 = 99.91 : x
  2. Step 2: Convert to fraction form
    141.31/194.79 = 99.91/x
  3. Step 3: Cross multiply
    141.31x = 194.79 × 99.91
  4. Step 4: Simplify right side
    141.31x = 19,461.47
  5. Step 5: Solve for x
    x = 19,461.47/141.31
  6. Step 6: Final answer
    x = 137.72

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.