Home / 66,021.44-91,121.24-39,178.75

Finding the Fourth Proportional to 66,021.44, 91,121.24 and 39,178.75

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Solution

The fourth proportional to 66,021.44, 91,121.24 and 39,178.75 is: 54,073.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,021.44 : 91,121.24 = 39,178.75 : x
  2. Step 2: Convert to fraction form
    66,021.44/91,121.24 = 39,178.75/x
  3. Step 3: Cross multiply
    66,021.44x = 91,121.24 × 39,178.75
  4. Step 4: Simplify right side
    66,021.44x = 3,570,015,857.95
  5. Step 5: Solve for x
    x = 3,570,015,857.95/66,021.44
  6. Step 6: Final answer
    x = 54,073.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.