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Finding the Fourth Proportional to 131,171.79, 181,043.97 and 83,415.91

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Solution

The fourth proportional to 131,171.79, 181,043.97 and 83,415.91 is: 115,131.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,171.79 : 181,043.97 = 83,415.91 : x
  2. Step 2: Convert to fraction form
    131,171.79/181,043.97 = 83,415.91/x
  3. Step 3: Cross multiply
    131,171.79x = 181,043.97 × 83,415.91
  4. Step 4: Simplify right side
    131,171.79x = 15,101,947,507.56
  5. Step 5: Solve for x
    x = 15,101,947,507.56/131,171.79
  6. Step 6: Final answer
    x = 115,131.06

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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.