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Finding the Fourth Proportional to 121,766.40, 168,026.40 and 68,043.92

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Solution

The fourth proportional to 121,766.40, 168,026.40 and 68,043.92 is: 93,894.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,766.40 : 168,026.40 = 68,043.92 : x
  2. Step 2: Convert to fraction form
    121,766.40/168,026.40 = 68,043.92/x
  3. Step 3: Cross multiply
    121,766.40x = 168,026.40 × 68,043.92
  4. Step 4: Simplify right side
    121,766.40x = 11,433,174,919.49
  5. Step 5: Solve for x
    x = 11,433,174,919.49/121,766.40
  6. Step 6: Final answer
    x = 93,894.33

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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.