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Finding the Fourth Proportional to 291,189.47, 436,786.65 and 80,843.81

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Solution

The fourth proportional to 291,189.47, 436,786.65 and 80,843.81 is: 121,266.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,189.47 : 436,786.65 = 80,843.81 : x
  2. Step 2: Convert to fraction form
    291,189.47/436,786.65 = 80,843.81/x
  3. Step 3: Cross multiply
    291,189.47x = 436,786.65 × 80,843.81
  4. Step 4: Simplify right side
    291,189.47x = 35,311,496,943.14
  5. Step 5: Solve for x
    x = 35,311,496,943.14/291,189.47
  6. Step 6: Final answer
    x = 121,266.39

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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.