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Finding the Fourth Proportional to 161,131.20, 241,696.80 and 91,147.20

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Solution

The fourth proportional to 161,131.20, 241,696.80 and 91,147.20 is: 136,720.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,131.20 : 241,696.80 = 91,147.20 : x
  2. Step 2: Convert to fraction form
    161,131.20/241,696.80 = 91,147.20/x
  3. Step 3: Cross multiply
    161,131.20x = 241,696.80 × 91,147.20
  4. Step 4: Simplify right side
    161,131.20x = 22,029,986,568.96
  5. Step 5: Solve for x
    x = 22,029,986,568.96/161,131.20
  6. Step 6: Final answer
    x = 136,720.80

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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.