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Finding the Fourth Proportional to 78,959.94, 118,491.48 and 29,040.54

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Solution

The fourth proportional to 78,959.94, 118,491.48 and 29,040.54 is: 43,579.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,959.94 : 118,491.48 = 29,040.54 : x
  2. Step 2: Convert to fraction form
    78,959.94/118,491.48 = 29,040.54/x
  3. Step 3: Cross multiply
    78,959.94x = 118,491.48 × 29,040.54
  4. Step 4: Simplify right side
    78,959.94x = 3,441,056,564.60
  5. Step 5: Solve for x
    x = 3,441,056,564.60/78,959.94
  6. Step 6: Final answer
    x = 43,579.78

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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.