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Finding the Fourth Proportional to 66,625.74, 91,945.73 and 38,331.43

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Solution

The fourth proportional to 66,625.74, 91,945.73 and 38,331.43 is: 52,898.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,625.74 : 91,945.73 = 38,331.43 : x
  2. Step 2: Convert to fraction form
    66,625.74/91,945.73 = 38,331.43/x
  3. Step 3: Cross multiply
    66,625.74x = 91,945.73 × 38,331.43
  4. Step 4: Simplify right side
    66,625.74x = 3,524,411,179.26
  5. Step 5: Solve for x
    x = 3,524,411,179.26/66,625.74
  6. Step 6: Final answer
    x = 52,898.64

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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.