Home / 76,839.37-115,259.05-20,679.60

Finding the Fourth Proportional to 76,839.37, 115,259.05 and 20,679.60

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Solution

The fourth proportional to 76,839.37, 115,259.05 and 20,679.60 is: 31,019.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,839.37 : 115,259.05 = 20,679.60 : x
  2. Step 2: Convert to fraction form
    76,839.37/115,259.05 = 20,679.60/x
  3. Step 3: Cross multiply
    76,839.37x = 115,259.05 × 20,679.60
  4. Step 4: Simplify right side
    76,839.37x = 2,383,511,050.38
  5. Step 5: Solve for x
    x = 2,383,511,050.38/76,839.37
  6. Step 6: Final answer
    x = 31,019.40

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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.