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Finding the Fourth Proportional to 291,042.54, 436,562.46 and 80,679.78

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Solution

The fourth proportional to 291,042.54, 436,562.46 and 80,679.78 is: 121,019.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,042.54 : 436,562.46 = 80,679.78 : x
  2. Step 2: Convert to fraction form
    291,042.54/436,562.46 = 80,679.78/x
  3. Step 3: Cross multiply
    291,042.54x = 436,562.46 × 80,679.78
  4. Step 4: Simplify right side
    291,042.54x = 35,221,763,229.06
  5. Step 5: Solve for x
    x = 35,221,763,229.06/291,042.54
  6. Step 6: Final answer
    x = 121,019.30

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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.