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Finding the Fourth Proportional to 121,437.54, 167,578.20 and 67,719.96

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Solution

The fourth proportional to 121,437.54, 167,578.20 and 67,719.96 is: 93,450.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,437.54 : 167,578.20 = 67,719.96 : x
  2. Step 2: Convert to fraction form
    121,437.54/167,578.20 = 67,719.96/x
  3. Step 3: Cross multiply
    121,437.54x = 167,578.20 × 67,719.96
  4. Step 4: Simplify right side
    121,437.54x = 11,348,389,000.87
  5. Step 5: Solve for x
    x = 11,348,389,000.87/121,437.54
  6. Step 6: Final answer
    x = 93,450.42

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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.