Home / 131,453.60-196,921.20-78,706.40

Finding the Fourth Proportional to 131,453.60, 196,921.20 and 78,706.40

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Solution

The fourth proportional to 131,453.60, 196,921.20 and 78,706.40 is: 117,904.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,453.60 : 196,921.20 = 78,706.40 : x
  2. Step 2: Convert to fraction form
    131,453.60/196,921.20 = 78,706.40/x
  3. Step 3: Cross multiply
    131,453.60x = 196,921.20 × 78,706.40
  4. Step 4: Simplify right side
    131,453.60x = 15,498,958,735.68
  5. Step 5: Solve for x
    x = 15,498,958,735.68/131,453.60
  6. Step 6: Final answer
    x = 117,904.41

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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.