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Finding the Fourth Proportional to 291,110.63, 436,665.94 and 80,748.56

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Solution

The fourth proportional to 291,110.63, 436,665.94 and 80,748.56 is: 121,122.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,110.63 : 436,665.94 = 80,748.56 : x
  2. Step 2: Convert to fraction form
    291,110.63/436,665.94 = 80,748.56/x
  3. Step 3: Cross multiply
    291,110.63x = 436,665.94 × 80,748.56
  4. Step 4: Simplify right side
    291,110.63x = 35,260,146,745.84
  5. Step 5: Solve for x
    x = 35,260,146,745.84/291,110.63
  6. Step 6: Final answer
    x = 121,122.84

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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.