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Finding the Fourth Proportional to 126,995.72, 175,190.65 and 81,076.82

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Solution

The fourth proportional to 126,995.72, 175,190.65 and 81,076.82 is: 111,845.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,995.72 : 175,190.65 = 81,076.82 : x
  2. Step 2: Convert to fraction form
    126,995.72/175,190.65 = 81,076.82/x
  3. Step 3: Cross multiply
    126,995.72x = 175,190.65 × 81,076.82
  4. Step 4: Simplify right side
    126,995.72x = 14,203,899,717.09
  5. Step 5: Solve for x
    x = 14,203,899,717.09/126,995.72
  6. Step 6: Final answer
    x = 111,845.50

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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.