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Finding the Fourth Proportional to 66,207.75, 91,366.70 and 36,399.75

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Solution

The fourth proportional to 66,207.75, 91,366.70 and 36,399.75 is: 50,231.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,207.75 : 91,366.70 = 36,399.75 : x
  2. Step 2: Convert to fraction form
    66,207.75/91,366.70 = 36,399.75/x
  3. Step 3: Cross multiply
    66,207.75x = 91,366.70 × 36,399.75
  4. Step 4: Simplify right side
    66,207.75x = 3,325,724,856.33
  5. Step 5: Solve for x
    x = 3,325,724,856.33/66,207.75
  6. Step 6: Final answer
    x = 50,231.66

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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.