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Finding the Fourth Proportional to 121,671.89, 167,905.40 and 67,957.65

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Solution

The fourth proportional to 121,671.89, 167,905.40 and 67,957.65 is: 93,780.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,671.89 : 167,905.40 = 67,957.65 : x
  2. Step 2: Convert to fraction form
    121,671.89/167,905.40 = 67,957.65/x
  3. Step 3: Cross multiply
    121,671.89x = 167,905.40 × 67,957.65
  4. Step 4: Simplify right side
    121,671.89x = 11,410,456,066.52
  5. Step 5: Solve for x
    x = 11,410,456,066.52/121,671.89
  6. Step 6: Final answer
    x = 93,780.55

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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.