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Finding the Fourth Proportional to 122,678.67, 169,292.12 and 68,968.69

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Solution

The fourth proportional to 122,678.67, 169,292.12 and 68,968.69 is: 95,174.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,678.67 : 169,292.12 = 68,968.69 : x
  2. Step 2: Convert to fraction form
    122,678.67/169,292.12 = 68,968.69/x
  3. Step 3: Cross multiply
    122,678.67x = 169,292.12 × 68,968.69
  4. Step 4: Simplify right side
    122,678.67x = 11,675,855,743.72
  5. Step 5: Solve for x
    x = 11,675,855,743.72/122,678.67
  6. Step 6: Final answer
    x = 95,174.29

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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.