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Finding the Fourth Proportional to 122,668.90, 169,301.01 and 68,958.34

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Solution

The fourth proportional to 122,668.90, 169,301.01 and 68,958.34 is: 95,172.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,668.90 : 169,301.01 = 68,958.34 : x
  2. Step 2: Convert to fraction form
    122,668.90/169,301.01 = 68,958.34/x
  3. Step 3: Cross multiply
    122,668.90x = 169,301.01 × 68,958.34
  4. Step 4: Simplify right side
    122,668.90x = 11,674,716,609.92
  5. Step 5: Solve for x
    x = 11,674,716,609.92/122,668.90
  6. Step 6: Final answer
    x = 95,172.59

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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.