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Finding the Fourth Proportional to 66,505.73, 91,765.33 and 39,650.72

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Solution

The fourth proportional to 66,505.73, 91,765.33 and 39,650.72 is: 54,710.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,505.73 : 91,765.33 = 39,650.72 : x
  2. Step 2: Convert to fraction form
    66,505.73/91,765.33 = 39,650.72/x
  3. Step 3: Cross multiply
    66,505.73x = 91,765.33 × 39,650.72
  4. Step 4: Simplify right side
    66,505.73x = 3,638,561,405.54
  5. Step 5: Solve for x
    x = 3,638,561,405.54/66,505.73
  6. Step 6: Final answer
    x = 54,710.49

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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.