Home / 128,949.16-177,940.38-71,591.80

Finding the Fourth Proportional to 128,949.16, 177,940.38 and 71,591.80

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Solution

The fourth proportional to 128,949.16, 177,940.38 and 71,591.80 is: 98,791.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,949.16 : 177,940.38 = 71,591.80 : x
  2. Step 2: Convert to fraction form
    128,949.16/177,940.38 = 71,591.80/x
  3. Step 3: Cross multiply
    128,949.16x = 177,940.38 × 71,591.80
  4. Step 4: Simplify right side
    128,949.16x = 12,739,072,096.88
  5. Step 5: Solve for x
    x = 12,739,072,096.88/128,949.16
  6. Step 6: Final answer
    x = 98,791.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.