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Finding the Fourth Proportional to 122,389.44, 168,900 and 68,678.34

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Solution

The fourth proportional to 122,389.44, 168,900 and 68,678.34 is: 94,777.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,389.44 : 168,900 = 68,678.34 : x
  2. Step 2: Convert to fraction form
    122,389.44/168,900 = 68,678.34/x
  3. Step 3: Cross multiply
    122,389.44x = 168,900 × 68,678.34
  4. Step 4: Simplify right side
    122,389.44x = 11,599,771,626
  5. Step 5: Solve for x
    x = 11,599,771,626/122,389.44
  6. Step 6: Final answer
    x = 94,777.55

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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.