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Finding the Fourth Proportional to 291,126.75, 436,690.33 and 80,764.89

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Solution

The fourth proportional to 291,126.75, 436,690.33 and 80,764.89 is: 121,147.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,126.75 : 436,690.33 = 80,764.89 : x
  2. Step 2: Convert to fraction form
    291,126.75/436,690.33 = 80,764.89/x
  3. Step 3: Cross multiply
    291,126.75x = 436,690.33 × 80,764.89
  4. Step 4: Simplify right side
    291,126.75x = 35,269,246,466.51
  5. Step 5: Solve for x
    x = 35,269,246,466.51/291,126.75
  6. Step 6: Final answer
    x = 121,147.39

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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.