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Finding the Fourth Proportional to 126,589.84, 174,769.78 and 78,907.80

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Solution

The fourth proportional to 126,589.84, 174,769.78 and 78,907.80 is: 108,940.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,589.84 : 174,769.78 = 78,907.80 : x
  2. Step 2: Convert to fraction form
    126,589.84/174,769.78 = 78,907.80/x
  3. Step 3: Cross multiply
    126,589.84x = 174,769.78 × 78,907.80
  4. Step 4: Simplify right side
    126,589.84x = 13,790,698,846.28
  5. Step 5: Solve for x
    x = 13,790,698,846.28/126,589.84
  6. Step 6: Final answer
    x = 108,940.01

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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.