Home / 136,982.40-189,049.32-80,392.56

Finding the Fourth Proportional to 136,982.40, 189,049.32 and 80,392.56

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Solution

The fourth proportional to 136,982.40, 189,049.32 and 80,392.56 is: 110,949.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,982.40 : 189,049.32 = 80,392.56 : x
  2. Step 2: Convert to fraction form
    136,982.40/189,049.32 = 80,392.56/x
  3. Step 3: Cross multiply
    136,982.40x = 189,049.32 × 80,392.56
  4. Step 4: Simplify right side
    136,982.40x = 15,198,158,801.06
  5. Step 5: Solve for x
    x = 15,198,158,801.06/136,982.40
  6. Step 6: Final answer
    x = 110,949.72

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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.