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Finding the Fourth Proportional to 143,305.88, 197,760.68 and 79,642.40

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Solution

The fourth proportional to 143,305.88, 197,760.68 and 79,642.40 is: 109,905.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,305.88 : 197,760.68 = 79,642.40 : x
  2. Step 2: Convert to fraction form
    143,305.88/197,760.68 = 79,642.40/x
  3. Step 3: Cross multiply
    143,305.88x = 197,760.68 × 79,642.40
  4. Step 4: Simplify right side
    143,305.88x = 15,750,135,180.83
  5. Step 5: Solve for x
    x = 15,750,135,180.83/143,305.88
  6. Step 6: Final answer
    x = 109,905.71

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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.