Home / 115,940.20-173,910.30-71,422.60

Finding the Fourth Proportional to 115,940.20, 173,910.30 and 71,422.60

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Solution

The fourth proportional to 115,940.20, 173,910.30 and 71,422.60 is: 107,133.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,940.20 : 173,910.30 = 71,422.60 : x
  2. Step 2: Convert to fraction form
    115,940.20/173,910.30 = 71,422.60/x
  3. Step 3: Cross multiply
    115,940.20x = 173,910.30 × 71,422.60
  4. Step 4: Simplify right side
    115,940.20x = 12,421,125,792.78
  5. Step 5: Solve for x
    x = 12,421,125,792.78/115,940.20
  6. Step 6: Final answer
    x = 107,133.90

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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.