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Finding the Fourth Proportional to 66,201.98, 91,356.72 and 37,905.80

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Solution

The fourth proportional to 66,201.98, 91,356.72 and 37,905.80 is: 52,308.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,201.98 : 91,356.72 = 37,905.80 : x
  2. Step 2: Convert to fraction form
    66,201.98/91,356.72 = 37,905.80/x
  3. Step 3: Cross multiply
    66,201.98x = 91,356.72 × 37,905.80
  4. Step 4: Simplify right side
    66,201.98x = 3,462,949,556.98
  5. Step 5: Solve for x
    x = 3,462,949,556.98/66,201.98
  6. Step 6: Final answer
    x = 52,308.85

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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.