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Finding the Fourth Proportional to 122,168.20, 168,592 and 68,453.59

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Solution

The fourth proportional to 122,168.20, 168,592 and 68,453.59 is: 94,465.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,168.20 : 168,592 = 68,453.59 : x
  2. Step 2: Convert to fraction form
    122,168.20/168,592 = 68,453.59/x
  3. Step 3: Cross multiply
    122,168.20x = 168,592 × 68,453.59
  4. Step 4: Simplify right side
    122,168.20x = 11,540,727,645.28
  5. Step 5: Solve for x
    x = 11,540,727,645.28/122,168.20
  6. Step 6: Final answer
    x = 94,465.89

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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.