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Finding the Fourth Proportional to 74,189, 102,380.94 and 40,197.48

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Solution

The fourth proportional to 74,189, 102,380.94 and 40,197.48 is: 55,472.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,189 : 102,380.94 = 40,197.48 : x
  2. Step 2: Convert to fraction form
    74,189/102,380.94 = 40,197.48/x
  3. Step 3: Cross multiply
    74,189x = 102,380.94 × 40,197.48
  4. Step 4: Simplify right side
    74,189x = 4,115,455,788.03
  5. Step 5: Solve for x
    x = 4,115,455,788.03/74,189
  6. Step 6: Final answer
    x = 55,472.59

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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.