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Finding the Fourth Proportional to 66,296, 91,489.12 and 36,488.64

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Solution

The fourth proportional to 66,296, 91,489.12 and 36,488.64 is: 50,354.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,296 : 91,489.12 = 36,488.64 : x
  2. Step 2: Convert to fraction form
    66,296/91,489.12 = 36,488.64/x
  3. Step 3: Cross multiply
    66,296x = 91,489.12 × 36,488.64
  4. Step 4: Simplify right side
    66,296x = 3,338,313,563.60
  5. Step 5: Solve for x
    x = 3,338,313,563.60/66,296
  6. Step 6: Final answer
    x = 50,354.68

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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.