Home / 66,371.06-91,589.09-38,778.28

Finding the Fourth Proportional to 66,371.06, 91,589.09 and 38,778.28

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Solution

The fourth proportional to 66,371.06, 91,589.09 and 38,778.28 is: 53,512.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,371.06 : 91,589.09 = 38,778.28 : x
  2. Step 2: Convert to fraction form
    66,371.06/91,589.09 = 38,778.28/x
  3. Step 3: Cross multiply
    66,371.06x = 91,589.09 × 38,778.28
  4. Step 4: Simplify right side
    66,371.06x = 3,551,667,376.97
  5. Step 5: Solve for x
    x = 3,551,667,376.97/66,371.06
  6. Step 6: Final answer
    x = 53,512.29

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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.