Home / 129,781.75-178,936.54-108,302.44

Finding the Fourth Proportional to 129,781.75, 178,936.54 and 108,302.44

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Solution

The fourth proportional to 129,781.75, 178,936.54 and 108,302.44 is: 149,321.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,781.75 : 178,936.54 = 108,302.44 : x
  2. Step 2: Convert to fraction form
    129,781.75/178,936.54 = 108,302.44/x
  3. Step 3: Cross multiply
    129,781.75x = 178,936.54 × 108,302.44
  4. Step 4: Simplify right side
    129,781.75x = 19,379,263,887.16
  5. Step 5: Solve for x
    x = 19,379,263,887.16/129,781.75
  6. Step 6: Final answer
    x = 149,321.95

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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.