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Finding the Fourth Proportional to 155,463.71, 214,540.83 and 87,481.82

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Solution

The fourth proportional to 155,463.71, 214,540.83 and 87,481.82 is: 120,725.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,463.71 : 214,540.83 = 87,481.82 : x
  2. Step 2: Convert to fraction form
    155,463.71/214,540.83 = 87,481.82/x
  3. Step 3: Cross multiply
    155,463.71x = 214,540.83 × 87,481.82
  4. Step 4: Simplify right side
    155,463.71x = 18,768,422,809.06
  5. Step 5: Solve for x
    x = 18,768,422,809.06/155,463.71
  6. Step 6: Final answer
    x = 120,725.43

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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.