Home / 80,040.09-120,135.48-40,625.49

Finding the Fourth Proportional to 80,040.09, 120,135.48 and 40,625.49

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Solution

The fourth proportional to 80,040.09, 120,135.48 and 40,625.49 is: 60,976.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,040.09 : 120,135.48 = 40,625.49 : x
  2. Step 2: Convert to fraction form
    80,040.09/120,135.48 = 40,625.49/x
  3. Step 3: Cross multiply
    80,040.09x = 120,135.48 × 40,625.49
  4. Step 4: Simplify right side
    80,040.09x = 4,880,562,741.39
  5. Step 5: Solve for x
    x = 4,880,562,741.39/80,040.09
  6. Step 6: Final answer
    x = 60,976.48

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1.5x scale

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.