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Finding the Fourth Proportional to 74,245.86, 101,891.21 and 73,720.98

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Solution

The fourth proportional to 74,245.86, 101,891.21 and 73,720.98 is: 101,170.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,245.86 : 101,891.21 = 73,720.98 : x
  2. Step 2: Convert to fraction form
    74,245.86/101,891.21 = 73,720.98/x
  3. Step 3: Cross multiply
    74,245.86x = 101,891.21 × 73,720.98
  4. Step 4: Simplify right side
    74,245.86x = 7,511,519,485.98
  5. Step 5: Solve for x
    x = 7,511,519,485.98/74,245.86
  6. Step 6: Final answer
    x = 101,170.89

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.