Home / 81,157.22-121,719.34-67,969.62

Finding the Fourth Proportional to 81,157.22, 121,719.34 and 67,969.62

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Solution

The fourth proportional to 81,157.22, 121,719.34 and 67,969.62 is: 101,940.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,157.22 : 121,719.34 = 67,969.62 : x
  2. Step 2: Convert to fraction form
    81,157.22/121,719.34 = 67,969.62/x
  3. Step 3: Cross multiply
    81,157.22x = 121,719.34 × 67,969.62
  4. Step 4: Simplify right side
    81,157.22x = 8,273,217,286.45
  5. Step 5: Solve for x
    x = 8,273,217,286.45/81,157.22
  6. Step 6: Final answer
    x = 101,940.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.