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Finding the Fourth Proportional to 66,385, 91,610.14 and 36,170.54

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Solution

The fourth proportional to 66,385, 91,610.14 and 36,170.54 is: 49,914.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,385 : 91,610.14 = 36,170.54 : x
  2. Step 2: Convert to fraction form
    66,385/91,610.14 = 36,170.54/x
  3. Step 3: Cross multiply
    66,385x = 91,610.14 × 36,170.54
  4. Step 4: Simplify right side
    66,385x = 3,313,588,233.28
  5. Step 5: Solve for x
    x = 3,313,588,233.28/66,385
  6. Step 6: Final answer
    x = 49,914.71

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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.