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Finding the Fourth Proportional to 121,672.47, 167,907.66 and 67,957.53

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Solution

The fourth proportional to 121,672.47, 167,907.66 and 67,957.53 is: 93,781.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,672.47 : 167,907.66 = 67,957.53 : x
  2. Step 2: Convert to fraction form
    121,672.47/167,907.66 = 67,957.53/x
  3. Step 3: Cross multiply
    121,672.47x = 167,907.66 × 67,957.53
  4. Step 4: Simplify right side
    121,672.47x = 11,410,589,841.68
  5. Step 5: Solve for x
    x = 11,410,589,841.68/121,672.47
  6. Step 6: Final answer
    x = 93,781.20

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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.