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Finding the Fourth Proportional to 66,620.43, 91,925.28 and 39,392.73

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Solution

The fourth proportional to 66,620.43, 91,925.28 and 39,392.73 is: 54,355.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,620.43 : 91,925.28 = 39,392.73 : x
  2. Step 2: Convert to fraction form
    66,620.43/91,925.28 = 39,392.73/x
  3. Step 3: Cross multiply
    66,620.43x = 91,925.28 × 39,392.73
  4. Step 4: Simplify right side
    66,620.43x = 3,621,187,735.21
  5. Step 5: Solve for x
    x = 3,621,187,735.21/66,620.43
  6. Step 6: Final answer
    x = 54,355.51

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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.