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Finding the Fourth Proportional to 115,725.40, 173,760.90 and 80,819.80

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Solution

The fourth proportional to 115,725.40, 173,760.90 and 80,819.80 is: 121,350.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,725.40 : 173,760.90 = 80,819.80 : x
  2. Step 2: Convert to fraction form
    115,725.40/173,760.90 = 80,819.80/x
  3. Step 3: Cross multiply
    115,725.40x = 173,760.90 × 80,819.80
  4. Step 4: Simplify right side
    115,725.40x = 14,043,321,185.82
  5. Step 5: Solve for x
    x = 14,043,321,185.82/115,725.40
  6. Step 6: Final answer
    x = 121,350.38

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1.5x scale

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.