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Finding the Fourth Proportional to 291,138.36, 436,707.72 and 80,776.56

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Solution

The fourth proportional to 291,138.36, 436,707.72 and 80,776.56 is: 121,164.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,138.36 : 436,707.72 = 80,776.56 : x
  2. Step 2: Convert to fraction form
    291,138.36/436,707.72 = 80,776.56/x
  3. Step 3: Cross multiply
    291,138.36x = 436,707.72 × 80,776.56
  4. Step 4: Simplify right side
    291,138.36x = 35,275,747,347.04
  5. Step 5: Solve for x
    x = 35,275,747,347.04/291,138.36
  6. Step 6: Final answer
    x = 121,164.89

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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.