Home / 102.51-141.39-65.61

Finding the Fourth Proportional to 102.51, 141.39 and 65.61

Calculator

Solution

The fourth proportional to 102.51, 141.39 and 65.61 is: 90.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.51 : 141.39 = 65.61 : x
  2. Step 2: Convert to fraction form
    102.51/141.39 = 65.61/x
  3. Step 3: Cross multiply
    102.51x = 141.39 × 65.61
  4. Step 4: Simplify right side
    102.51x = 9,276.60
  5. Step 5: Solve for x
    x = 9,276.60/102.51
  6. Step 6: Final answer
    x = 90.49

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.