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Finding the Fourth Proportional to 141,881.31, 195,797.73 and 78,221.39

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Solution

The fourth proportional to 141,881.31, 195,797.73 and 78,221.39 is: 107,946.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,881.31 : 195,797.73 = 78,221.39 : x
  2. Step 2: Convert to fraction form
    141,881.31/195,797.73 = 78,221.39/x
  3. Step 3: Cross multiply
    141,881.31x = 195,797.73 × 78,221.39
  4. Step 4: Simplify right side
    141,881.31x = 15,315,570,599.44
  5. Step 5: Solve for x
    x = 15,315,570,599.44/141,881.31
  6. Step 6: Final answer
    x = 107,946.36

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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.