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Finding the Fourth Proportional to 120,694.56, 166,554.48 and 72,939.72

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Solution

The fourth proportional to 120,694.56, 166,554.48 and 72,939.72 is: 100,654.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,694.56 : 166,554.48 = 72,939.72 : x
  2. Step 2: Convert to fraction form
    120,694.56/166,554.48 = 72,939.72/x
  3. Step 3: Cross multiply
    120,694.56x = 166,554.48 × 72,939.72
  4. Step 4: Simplify right side
    120,694.56x = 12,148,437,135.95
  5. Step 5: Solve for x
    x = 12,148,437,135.95/120,694.56
  6. Step 6: Final answer
    x = 100,654.39

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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.