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Finding the Fourth Proportional to 121,826.79, 168,136.41 and 68,114.97

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Solution

The fourth proportional to 121,826.79, 168,136.41 and 68,114.97 is: 94,007.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,826.79 : 168,136.41 = 68,114.97 : x
  2. Step 2: Convert to fraction form
    121,826.79/168,136.41 = 68,114.97/x
  3. Step 3: Cross multiply
    121,826.79x = 168,136.41 × 68,114.97
  4. Step 4: Simplify right side
    121,826.79x = 11,452,606,523.06
  5. Step 5: Solve for x
    x = 11,452,606,523.06/121,826.79
  6. Step 6: Final answer
    x = 94,007.29

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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.