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Finding the Fourth Proportional to 81,377.70, 122,066.55 and 68,255.70

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Solution

The fourth proportional to 81,377.70, 122,066.55 and 68,255.70 is: 102,383.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,377.70 : 122,066.55 = 68,255.70 : x
  2. Step 2: Convert to fraction form
    81,377.70/122,066.55 = 68,255.70/x
  3. Step 3: Cross multiply
    81,377.70x = 122,066.55 × 68,255.70
  4. Step 4: Simplify right side
    81,377.70x = 8,331,737,816.84
  5. Step 5: Solve for x
    x = 8,331,737,816.84/81,377.70
  6. Step 6: Final answer
    x = 102,383.55

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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.