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Finding the Fourth Proportional to 66,171, 91,314.84 and 35,956.80

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Solution

The fourth proportional to 66,171, 91,314.84 and 35,956.80 is: 49,619.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,171 : 91,314.84 = 35,956.80 : x
  2. Step 2: Convert to fraction form
    66,171/91,314.84 = 35,956.80/x
  3. Step 3: Cross multiply
    66,171x = 91,314.84 × 35,956.80
  4. Step 4: Simplify right side
    66,171x = 3,283,389,438.91
  5. Step 5: Solve for x
    x = 3,283,389,438.91/66,171
  6. Step 6: Final answer
    x = 49,619.76

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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.