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Finding the Fourth Proportional to 143,354.58, 197,836.36 and 79,691

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Solution

The fourth proportional to 143,354.58, 197,836.36 and 79,691 is: 109,977.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,354.58 : 197,836.36 = 79,691 : x
  2. Step 2: Convert to fraction form
    143,354.58/197,836.36 = 79,691/x
  3. Step 3: Cross multiply
    143,354.58x = 197,836.36 × 79,691
  4. Step 4: Simplify right side
    143,354.58x = 15,765,777,364.76
  5. Step 5: Solve for x
    x = 15,765,777,364.76/143,354.58
  6. Step 6: Final answer
    x = 109,977.49

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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.