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Finding the Fourth Proportional to 66,133.31, 91,249.76 and 39,284.87

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Solution

The fourth proportional to 66,133.31, 91,249.76 and 39,284.87 is: 54,204.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,133.31 : 91,249.76 = 39,284.87 : x
  2. Step 2: Convert to fraction form
    66,133.31/91,249.76 = 39,284.87/x
  3. Step 3: Cross multiply
    66,133.31x = 91,249.76 × 39,284.87
  4. Step 4: Simplify right side
    66,133.31x = 3,584,734,601.09
  5. Step 5: Solve for x
    x = 3,584,734,601.09/66,133.31
  6. Step 6: Final answer
    x = 54,204.68

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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.