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Finding the Fourth Proportional to 66,343.97, 91,553.31 and 36,129.83

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Solution

The fourth proportional to 66,343.97, 91,553.31 and 36,129.83 is: 49,858.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,343.97 : 91,553.31 = 36,129.83 : x
  2. Step 2: Convert to fraction form
    66,343.97/91,553.31 = 36,129.83/x
  3. Step 3: Cross multiply
    66,343.97x = 91,553.31 × 36,129.83
  4. Step 4: Simplify right side
    66,343.97x = 3,307,805,068.47
  5. Step 5: Solve for x
    x = 3,307,805,068.47/66,343.97
  6. Step 6: Final answer
    x = 49,858.41

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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.