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Finding the Fourth Proportional to 136,969.56, 205,171.32 and 80,636.12

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Solution

The fourth proportional to 136,969.56, 205,171.32 and 80,636.12 is: 120,787.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,969.56 : 205,171.32 = 80,636.12 : x
  2. Step 2: Convert to fraction form
    136,969.56/205,171.32 = 80,636.12/x
  3. Step 3: Cross multiply
    136,969.56x = 205,171.32 × 80,636.12
  4. Step 4: Simplify right side
    136,969.56x = 16,544,219,180.08
  5. Step 5: Solve for x
    x = 16,544,219,180.08/136,969.56
  6. Step 6: Final answer
    x = 120,787.56

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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.