Home / 131,481.60-197,222.40-78,259.20

Finding the Fourth Proportional to 131,481.60, 197,222.40 and 78,259.20

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Solution

The fourth proportional to 131,481.60, 197,222.40 and 78,259.20 is: 117,388.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,481.60 : 197,222.40 = 78,259.20 : x
  2. Step 2: Convert to fraction form
    131,481.60/197,222.40 = 78,259.20/x
  3. Step 3: Cross multiply
    131,481.60x = 197,222.40 × 78,259.20
  4. Step 4: Simplify right side
    131,481.60x = 15,434,467,246.08
  5. Step 5: Solve for x
    x = 15,434,467,246.08/131,481.60
  6. Step 6: Final answer
    x = 117,388.80

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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.