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Finding the Fourth Proportional to 291,098.98, 436,648.42 and 80,736.94

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Solution

The fourth proportional to 291,098.98, 436,648.42 and 80,736.94 is: 121,105.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,098.98 : 436,648.42 = 80,736.94 : x
  2. Step 2: Convert to fraction form
    291,098.98/436,648.42 = 80,736.94/x
  3. Step 3: Cross multiply
    291,098.98x = 436,648.42 × 80,736.94
  4. Step 4: Simplify right side
    291,098.98x = 35,253,657,286.63
  5. Step 5: Solve for x
    x = 35,253,657,286.63/291,098.98
  6. Step 6: Final answer
    x = 121,105.40

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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.