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Finding the Fourth Proportional to 440,563.21, 660,845.44 and 108,139.21

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Solution

The fourth proportional to 440,563.21, 660,845.44 and 108,139.21 is: 162,208.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,563.21 : 660,845.44 = 108,139.21 : x
  2. Step 2: Convert to fraction form
    440,563.21/660,845.44 = 108,139.21/x
  3. Step 3: Cross multiply
    440,563.21x = 660,845.44 × 108,139.21
  4. Step 4: Simplify right side
    440,563.21x = 71,463,303,813.70
  5. Step 5: Solve for x
    x = 71,463,303,813.70/440,563.21
  6. Step 6: Final answer
    x = 162,208.97

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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.