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Finding the Fourth Proportional to 123,872.70, 170,939.25 and 67,282.86

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Solution

The fourth proportional to 123,872.70, 170,939.25 and 67,282.86 is: 92,847.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,872.70 : 170,939.25 = 67,282.86 : x
  2. Step 2: Convert to fraction form
    123,872.70/170,939.25 = 67,282.86/x
  3. Step 3: Cross multiply
    123,872.70x = 170,939.25 × 67,282.86
  4. Step 4: Simplify right side
    123,872.70x = 11,501,281,626.26
  5. Step 5: Solve for x
    x = 11,501,281,626.26/123,872.70
  6. Step 6: Final answer
    x = 92,847.59

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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.