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Finding the Fourth Proportional to 121,505.82, 167,677.80 and 67,787.64

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Solution

The fourth proportional to 121,505.82, 167,677.80 and 67,787.64 is: 93,546.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,505.82 : 167,677.80 = 67,787.64 : x
  2. Step 2: Convert to fraction form
    121,505.82/167,677.80 = 67,787.64/x
  3. Step 3: Cross multiply
    121,505.82x = 167,677.80 × 67,787.64
  4. Step 4: Simplify right side
    121,505.82x = 11,366,482,342.39
  5. Step 5: Solve for x
    x = 11,366,482,342.39/121,505.82
  6. Step 6: Final answer
    x = 93,546.81

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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.