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Finding the Fourth Proportional to 291,132.89, 436,699.52 and 80,771.03

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Solution

The fourth proportional to 291,132.89, 436,699.52 and 80,771.03 is: 121,156.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,132.89 : 436,699.52 = 80,771.03 : x
  2. Step 2: Convert to fraction form
    291,132.89/436,699.52 = 80,771.03/x
  3. Step 3: Cross multiply
    291,132.89x = 436,699.52 × 80,771.03
  4. Step 4: Simplify right side
    291,132.89x = 35,272,669,627.05
  5. Step 5: Solve for x
    x = 35,272,669,627.05/291,132.89
  6. Step 6: Final answer
    x = 121,156.59

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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.