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Finding the Fourth Proportional to 66,601.44, 91,919.61 and 39,745.08

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Solution

The fourth proportional to 66,601.44, 91,919.61 and 39,745.08 is: 54,853.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,601.44 : 91,919.61 = 39,745.08 : x
  2. Step 2: Convert to fraction form
    66,601.44/91,919.61 = 39,745.08/x
  3. Step 3: Cross multiply
    66,601.44x = 91,919.61 × 39,745.08
  4. Step 4: Simplify right side
    66,601.44x = 3,653,352,253.02
  5. Step 5: Solve for x
    x = 3,653,352,253.02/66,601.44
  6. Step 6: Final answer
    x = 54,853.95

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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.