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Finding the Fourth Proportional to 291,083.63, 436,625.44 and 80,721.56

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Solution

The fourth proportional to 291,083.63, 436,625.44 and 80,721.56 is: 121,082.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,083.63 : 436,625.44 = 80,721.56 : x
  2. Step 2: Convert to fraction form
    291,083.63/436,625.44 = 80,721.56/x
  3. Step 3: Cross multiply
    291,083.63x = 436,625.44 × 80,721.56
  4. Step 4: Simplify right side
    291,083.63x = 35,245,087,542.25
  5. Step 5: Solve for x
    x = 35,245,087,542.25/291,083.63
  6. Step 6: Final answer
    x = 121,082.34

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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.