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Finding the Fourth Proportional to 66,661.92, 91,993.50 and 36,446.76

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Solution

The fourth proportional to 66,661.92, 91,993.50 and 36,446.76 is: 50,296.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,661.92 : 91,993.50 = 36,446.76 : x
  2. Step 2: Convert to fraction form
    66,661.92/91,993.50 = 36,446.76/x
  3. Step 3: Cross multiply
    66,661.92x = 91,993.50 × 36,446.76
  4. Step 4: Simplify right side
    66,661.92x = 3,352,865,016.06
  5. Step 5: Solve for x
    x = 3,352,865,016.06/66,661.92
  6. Step 6: Final answer
    x = 50,296.56

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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.