Home / 129,415.87-178,566.45-81,641.53

Finding the Fourth Proportional to 129,415.87, 178,566.45 and 81,641.53

Calculator

Solution

The fourth proportional to 129,415.87, 178,566.45 and 81,641.53 is: 112,647.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,415.87 : 178,566.45 = 81,641.53 : x
  2. Step 2: Convert to fraction form
    129,415.87/178,566.45 = 81,641.53/x
  3. Step 3: Cross multiply
    129,415.87x = 178,566.45 × 81,641.53
  4. Step 4: Simplify right side
    129,415.87x = 14,578,438,331.34
  5. Step 5: Solve for x
    x = 14,578,438,331.34/129,415.87
  6. Step 6: Final answer
    x = 112,647.99

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.