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Finding the Fourth Proportional to 66,620.96, 91,923.36 and 39,754.88

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Solution

The fourth proportional to 66,620.96, 91,923.36 and 39,754.88 is: 54,853.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,620.96 : 91,923.36 = 39,754.88 : x
  2. Step 2: Convert to fraction form
    66,620.96/91,923.36 = 39,754.88/x
  3. Step 3: Cross multiply
    66,620.96x = 91,923.36 × 39,754.88
  4. Step 4: Simplify right side
    66,620.96x = 3,654,402,146.00
  5. Step 5: Solve for x
    x = 3,654,402,146.00/66,620.96
  6. Step 6: Final answer
    x = 54,853.64

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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.