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Finding the Fourth Proportional to 66,674.56, 91,976.16 and 39,808.48

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Solution

The fourth proportional to 66,674.56, 91,976.16 and 39,808.48 is: 54,914.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,674.56 : 91,976.16 = 39,808.48 : x
  2. Step 2: Convert to fraction form
    66,674.56/91,976.16 = 39,808.48/x
  3. Step 3: Cross multiply
    66,674.56x = 91,976.16 × 39,808.48
  4. Step 4: Simplify right side
    66,674.56x = 3,661,431,125.84
  5. Step 5: Solve for x
    x = 3,661,431,125.84/66,674.56
  6. Step 6: Final answer
    x = 54,914.96

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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.