Home / 78,375.20-117,571-25,788.84

Finding the Fourth Proportional to 78,375.20, 117,571 and 25,788.84

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Solution

The fourth proportional to 78,375.20, 117,571 and 25,788.84 is: 38,685.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,375.20 : 117,571 = 25,788.84 : x
  2. Step 2: Convert to fraction form
    78,375.20/117,571 = 25,788.84/x
  3. Step 3: Cross multiply
    78,375.20x = 117,571 × 25,788.84
  4. Step 4: Simplify right side
    78,375.20x = 3,032,019,707.64
  5. Step 5: Solve for x
    x = 3,032,019,707.64/78,375.20
  6. Step 6: Final answer
    x = 38,685.96

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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.