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Finding the Fourth Proportional to 155,418.59, 214,477.97 and 91,760.48

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Solution

The fourth proportional to 155,418.59, 214,477.97 and 91,760.48 is: 126,629.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,418.59 : 214,477.97 = 91,760.48 : x
  2. Step 2: Convert to fraction form
    155,418.59/214,477.97 = 91,760.48/x
  3. Step 3: Cross multiply
    155,418.59x = 214,477.97 × 91,760.48
  4. Step 4: Simplify right side
    155,418.59x = 19,680,599,945.43
  5. Step 5: Solve for x
    x = 19,680,599,945.43/155,418.59
  6. Step 6: Final answer
    x = 126,629.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.