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Finding the Fourth Proportional to 66,383.21, 91,601.48 and 39,520.47

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Solution

The fourth proportional to 66,383.21, 91,601.48 and 39,520.47 is: 54,533.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,383.21 : 91,601.48 = 39,520.47 : x
  2. Step 2: Convert to fraction form
    66,383.21/91,601.48 = 39,520.47/x
  3. Step 3: Cross multiply
    66,383.21x = 91,601.48 × 39,520.47
  4. Step 4: Simplify right side
    66,383.21x = 3,620,133,984.60
  5. Step 5: Solve for x
    x = 3,620,133,984.60/66,383.21
  6. Step 6: Final answer
    x = 54,533.88

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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.