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Finding the Fourth Proportional to 226,661.80, 339,992.70 and 78,917.80

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Solution

The fourth proportional to 226,661.80, 339,992.70 and 78,917.80 is: 118,376.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    226,661.80 : 339,992.70 = 78,917.80 : x
  2. Step 2: Convert to fraction form
    226,661.80/339,992.70 = 78,917.80/x
  3. Step 3: Cross multiply
    226,661.80x = 339,992.70 × 78,917.80
  4. Step 4: Simplify right side
    226,661.80x = 26,831,475,900.06
  5. Step 5: Solve for x
    x = 26,831,475,900.06/226,661.80
  6. Step 6: Final answer
    x = 118,376.70

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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.