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Finding the Fourth Proportional to 291,077.28, 436,615.99 and 80,715.22

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Solution

The fourth proportional to 291,077.28, 436,615.99 and 80,715.22 is: 121,072.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,077.28 : 436,615.99 = 80,715.22 : x
  2. Step 2: Convert to fraction form
    291,077.28/436,615.99 = 80,715.22/x
  3. Step 3: Cross multiply
    291,077.28x = 436,615.99 × 80,715.22
  4. Step 4: Simplify right side
    291,077.28x = 35,241,554,395.04
  5. Step 5: Solve for x
    x = 35,241,554,395.04/291,077.28
  6. Step 6: Final answer
    x = 121,072.84

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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.