Home / 78,120.09-117,161.55-33,722.55

Finding the Fourth Proportional to 78,120.09, 117,161.55 and 33,722.55

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Solution

The fourth proportional to 78,120.09, 117,161.55 and 33,722.55 is: 50,575.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,120.09 : 117,161.55 = 33,722.55 : x
  2. Step 2: Convert to fraction form
    78,120.09/117,161.55 = 33,722.55/x
  3. Step 3: Cross multiply
    78,120.09x = 117,161.55 × 33,722.55
  4. Step 4: Simplify right side
    78,120.09x = 3,950,986,227.95
  5. Step 5: Solve for x
    x = 3,950,986,227.95/78,120.09
  6. Step 6: Final answer
    x = 50,575.80

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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.