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Finding the Fourth Proportional to 123,768.43, 170,795.86 and 67,178.59

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Solution

The fourth proportional to 123,768.43, 170,795.86 and 67,178.59 is: 92,703.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,768.43 : 170,795.86 = 67,178.59 : x
  2. Step 2: Convert to fraction form
    123,768.43/170,795.86 = 67,178.59/x
  3. Step 3: Cross multiply
    123,768.43x = 170,795.86 × 67,178.59
  4. Step 4: Simplify right side
    123,768.43x = 11,473,825,052.64
  5. Step 5: Solve for x
    x = 11,473,825,052.64/123,768.43
  6. Step 6: Final answer
    x = 92,703.97

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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.