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Finding the Fourth Proportional to 118,887.75, 178,205.94 and 43,959.78

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Solution

The fourth proportional to 118,887.75, 178,205.94 and 43,959.78 is: 65,893.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,887.75 : 178,205.94 = 43,959.78 : x
  2. Step 2: Convert to fraction form
    118,887.75/178,205.94 = 43,959.78/x
  3. Step 3: Cross multiply
    118,887.75x = 178,205.94 × 43,959.78
  4. Step 4: Simplify right side
    118,887.75x = 7,833,893,917.09
  5. Step 5: Solve for x
    x = 7,833,893,917.09/118,887.75
  6. Step 6: Final answer
    x = 65,893.20

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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.