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Finding the Fourth Proportional to 121,671.80, 167,890.47 and 67,949.97

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Solution

The fourth proportional to 121,671.80, 167,890.47 and 67,949.97 is: 93,761.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,671.80 : 167,890.47 = 67,949.97 : x
  2. Step 2: Convert to fraction form
    121,671.80/167,890.47 = 67,949.97/x
  3. Step 3: Cross multiply
    121,671.80x = 167,890.47 × 67,949.97
  4. Step 4: Simplify right side
    121,671.80x = 11,408,152,399.79
  5. Step 5: Solve for x
    x = 11,408,152,399.79/121,671.80
  6. Step 6: Final answer
    x = 93,761.68

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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.