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Finding the Fourth Proportional to 252,085.77, 378,189 and 72,173.70

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Solution

The fourth proportional to 252,085.77, 378,189 and 72,173.70 is: 108,277.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,085.77 : 378,189 = 72,173.70 : x
  2. Step 2: Convert to fraction form
    252,085.77/378,189 = 72,173.70/x
  3. Step 3: Cross multiply
    252,085.77x = 378,189 × 72,173.70
  4. Step 4: Simplify right side
    252,085.77x = 27,295,299,429.30
  5. Step 5: Solve for x
    x = 27,295,299,429.30/252,085.77
  6. Step 6: Final answer
    x = 108,277.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.