Home / 131,441.20-197,161.80-78,823.60

Finding the Fourth Proportional to 131,441.20, 197,161.80 and 78,823.60

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Solution

The fourth proportional to 131,441.20, 197,161.80 and 78,823.60 is: 118,235.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,441.20 : 197,161.80 = 78,823.60 : x
  2. Step 2: Convert to fraction form
    131,441.20/197,161.80 = 78,823.60/x
  3. Step 3: Cross multiply
    131,441.20x = 197,161.80 × 78,823.60
  4. Step 4: Simplify right side
    131,441.20x = 15,541,002,858.48
  5. Step 5: Solve for x
    x = 15,541,002,858.48/131,441.20
  6. Step 6: Final answer
    x = 118,235.40

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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.