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Finding the Fourth Proportional to 155,755.28, 214,917.90 and 87,768.74

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Solution

The fourth proportional to 155,755.28, 214,917.90 and 87,768.74 is: 121,107.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,755.28 : 214,917.90 = 87,768.74 : x
  2. Step 2: Convert to fraction form
    155,755.28/214,917.90 = 87,768.74/x
  3. Step 3: Cross multiply
    155,755.28x = 214,917.90 × 87,768.74
  4. Step 4: Simplify right side
    155,755.28x = 18,863,073,286.45
  5. Step 5: Solve for x
    x = 18,863,073,286.45/155,755.28
  6. Step 6: Final answer
    x = 121,107.12

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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.