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Finding the Fourth Proportional to 218,115.70, 326,930.55 and 84,951.70

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Solution

The fourth proportional to 218,115.70, 326,930.55 and 84,951.70 is: 127,332.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,115.70 : 326,930.55 = 84,951.70 : x
  2. Step 2: Convert to fraction form
    218,115.70/326,930.55 = 84,951.70/x
  3. Step 3: Cross multiply
    218,115.70x = 326,930.55 × 84,951.70
  4. Step 4: Simplify right side
    218,115.70x = 27,773,306,004.44
  5. Step 5: Solve for x
    x = 27,773,306,004.44/218,115.70
  6. Step 6: Final answer
    x = 127,332.91

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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.