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Finding the Fourth Proportional to 143,671.88, 215,539.50 and 43,839.78

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Solution

The fourth proportional to 143,671.88, 215,539.50 and 43,839.78 is: 65,769.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,671.88 : 215,539.50 = 43,839.78 : x
  2. Step 2: Convert to fraction form
    143,671.88/215,539.50 = 43,839.78/x
  3. Step 3: Cross multiply
    143,671.88x = 215,539.50 × 43,839.78
  4. Step 4: Simplify right side
    143,671.88x = 9,449,204,261.31
  5. Step 5: Solve for x
    x = 9,449,204,261.31/143,671.88
  6. Step 6: Final answer
    x = 65,769.34

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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.