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Finding the Fourth Proportional to 123,381.90, 170,267.09 and 66,793.28

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Solution

The fourth proportional to 123,381.90, 170,267.09 and 66,793.28 is: 92,174.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,381.90 : 170,267.09 = 66,793.28 : x
  2. Step 2: Convert to fraction form
    123,381.90/170,267.09 = 66,793.28/x
  3. Step 3: Cross multiply
    123,381.90x = 170,267.09 × 66,793.28
  4. Step 4: Simplify right side
    123,381.90x = 11,372,696,231.85
  5. Step 5: Solve for x
    x = 11,372,696,231.85/123,381.90
  6. Step 6: Final answer
    x = 92,174.75

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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.