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Finding the Fourth Proportional to 121,883.52, 168,198.48 and 68,168.28

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Solution

The fourth proportional to 121,883.52, 168,198.48 and 68,168.28 is: 94,071.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,883.52 : 168,198.48 = 68,168.28 : x
  2. Step 2: Convert to fraction form
    121,883.52/168,198.48 = 68,168.28/x
  3. Step 3: Cross multiply
    121,883.52x = 168,198.48 × 68,168.28
  4. Step 4: Simplify right side
    121,883.52x = 11,465,801,080.21
  5. Step 5: Solve for x
    x = 11,465,801,080.21/121,883.52
  6. Step 6: Final answer
    x = 94,071.79

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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.