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Finding the Fourth Proportional to 66,469.31, 91,761.51 and 51,327.98

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Solution

The fourth proportional to 66,469.31, 91,761.51 and 51,327.98 is: 70,858.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,469.31 : 91,761.51 = 51,327.98 : x
  2. Step 2: Convert to fraction form
    66,469.31/91,761.51 = 51,327.98/x
  3. Step 3: Cross multiply
    66,469.31x = 91,761.51 × 51,327.98
  4. Step 4: Simplify right side
    66,469.31x = 4,709,932,739.11
  5. Step 5: Solve for x
    x = 4,709,932,739.11/66,469.31
  6. Step 6: Final answer
    x = 70,858.76

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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.