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Finding the Fourth Proportional to 101,876.63, 140,724.42 and 84,936.29

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Solution

The fourth proportional to 101,876.63, 140,724.42 and 84,936.29 is: 117,324.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,876.63 : 140,724.42 = 84,936.29 : x
  2. Step 2: Convert to fraction form
    101,876.63/140,724.42 = 84,936.29/x
  3. Step 3: Cross multiply
    101,876.63x = 140,724.42 × 84,936.29
  4. Step 4: Simplify right side
    101,876.63x = 11,952,610,147.20
  5. Step 5: Solve for x
    x = 11,952,610,147.20/101,876.63
  6. Step 6: Final answer
    x = 117,324.36

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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.