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Finding the Fourth Proportional to 133,338, 183,991.36 and 78,891.83

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Solution

The fourth proportional to 133,338, 183,991.36 and 78,891.83 is: 108,861.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,338 : 183,991.36 = 78,891.83 : x
  2. Step 2: Convert to fraction form
    133,338/183,991.36 = 78,891.83/x
  3. Step 3: Cross multiply
    133,338x = 183,991.36 × 78,891.83
  4. Step 4: Simplify right side
    133,338x = 14,515,415,094.59
  5. Step 5: Solve for x
    x = 14,515,415,094.59/133,338
  6. Step 6: Final answer
    x = 108,861.80

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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.