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Finding the Fourth Proportional to 121,892.28, 168,194.54 and 68,174.52

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Solution

The fourth proportional to 121,892.28, 168,194.54 and 68,174.52 is: 94,071.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,892.28 : 168,194.54 = 68,174.52 : x
  2. Step 2: Convert to fraction form
    121,892.28/168,194.54 = 68,174.52/x
  3. Step 3: Cross multiply
    121,892.28x = 168,194.54 × 68,174.52
  4. Step 4: Simplify right side
    121,892.28x = 11,466,582,031.12
  5. Step 5: Solve for x
    x = 11,466,582,031.12/121,892.28
  6. Step 6: Final answer
    x = 94,071.44

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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.