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Finding the Fourth Proportional to 121,992.75, 168,340.28 and 68,275.17

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Solution

The fourth proportional to 121,992.75, 168,340.28 and 68,275.17 is: 94,214.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,992.75 : 168,340.28 = 68,275.17 : x
  2. Step 2: Convert to fraction form
    121,992.75/168,340.28 = 68,275.17/x
  3. Step 3: Cross multiply
    121,992.75x = 168,340.28 × 68,275.17
  4. Step 4: Simplify right side
    121,992.75x = 11,493,460,893.47
  5. Step 5: Solve for x
    x = 11,493,460,893.47/121,992.75
  6. Step 6: Final answer
    x = 94,214.29

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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.