Home / 259,941.40-389,949.30-80,042.05

Finding the Fourth Proportional to 259,941.40, 389,949.30 and 80,042.05

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Solution

The fourth proportional to 259,941.40, 389,949.30 and 80,042.05 is: 120,074.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,941.40 : 389,949.30 = 80,042.05 : x
  2. Step 2: Convert to fraction form
    259,941.40/389,949.30 = 80,042.05/x
  3. Step 3: Cross multiply
    259,941.40x = 389,949.30 × 80,042.05
  4. Step 4: Simplify right side
    259,941.40x = 31,212,341,368.07
  5. Step 5: Solve for x
    x = 31,212,341,368.07/259,941.40
  6. Step 6: Final answer
    x = 120,074.53

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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.