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Finding the Fourth Proportional to 66,634.47, 91,896 and 55,285.97

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Solution

The fourth proportional to 66,634.47, 91,896 and 55,285.97 is: 76,245.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,634.47 : 91,896 = 55,285.97 : x
  2. Step 2: Convert to fraction form
    66,634.47/91,896 = 55,285.97/x
  3. Step 3: Cross multiply
    66,634.47x = 91,896 × 55,285.97
  4. Step 4: Simplify right side
    66,634.47x = 5,080,559,039.64
  5. Step 5: Solve for x
    x = 5,080,559,039.64/66,634.47
  6. Step 6: Final answer
    x = 76,245.21

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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.