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Finding the Fourth Proportional to 291,149.86, 436,719.92 and 131,136.80

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Solution

The fourth proportional to 291,149.86, 436,719.92 and 131,136.80 is: 196,703.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,149.86 : 436,719.92 = 131,136.80 : x
  2. Step 2: Convert to fraction form
    291,149.86/436,719.92 = 131,136.80/x
  3. Step 3: Cross multiply
    291,149.86x = 436,719.92 × 131,136.80
  4. Step 4: Simplify right side
    291,149.86x = 57,270,052,805.06
  5. Step 5: Solve for x
    x = 57,270,052,805.06/291,149.86
  6. Step 6: Final answer
    x = 196,703.01

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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.