Home / 137,074.40-189,121.20-80,453.60

Finding the Fourth Proportional to 137,074.40, 189,121.20 and 80,453.60

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Solution

The fourth proportional to 137,074.40, 189,121.20 and 80,453.60 is: 111,001.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,074.40 : 189,121.20 = 80,453.60 : x
  2. Step 2: Convert to fraction form
    137,074.40/189,121.20 = 80,453.60/x
  3. Step 3: Cross multiply
    137,074.40x = 189,121.20 × 80,453.60
  4. Step 4: Simplify right side
    137,074.40x = 15,215,481,376.32
  5. Step 5: Solve for x
    x = 15,215,481,376.32/137,074.40
  6. Step 6: Final answer
    x = 111,001.63

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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.