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Finding the Fourth Proportional to 122,491.42, 169,042.89 and 68,047.71

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Solution

The fourth proportional to 122,491.42, 169,042.89 and 68,047.71 is: 93,908.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,491.42 : 169,042.89 = 68,047.71 : x
  2. Step 2: Convert to fraction form
    122,491.42/169,042.89 = 68,047.71/x
  3. Step 3: Cross multiply
    122,491.42x = 169,042.89 × 68,047.71
  4. Step 4: Simplify right side
    122,491.42x = 11,502,981,556.28
  5. Step 5: Solve for x
    x = 11,502,981,556.28/122,491.42
  6. Step 6: Final answer
    x = 93,908.47

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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.