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Finding the Fourth Proportional to 80,901.54, 120,719.39 and 72,495.96

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Solution

The fourth proportional to 80,901.54, 120,719.39 and 72,495.96 is: 108,176.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,901.54 : 120,719.39 = 72,495.96 : x
  2. Step 2: Convert to fraction form
    80,901.54/120,719.39 = 72,495.96/x
  3. Step 3: Cross multiply
    80,901.54x = 120,719.39 × 72,495.96
  4. Step 4: Simplify right side
    80,901.54x = 8,751,667,706.18
  5. Step 5: Solve for x
    x = 8,751,667,706.18/80,901.54
  6. Step 6: Final answer
    x = 108,176.78

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.