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Finding the Fourth Proportional to 81,628.83, 112,610.66 and 54,743.31

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Solution

The fourth proportional to 81,628.83, 112,610.66 and 54,743.31 is: 75,520.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,628.83 : 112,610.66 = 54,743.31 : x
  2. Step 2: Convert to fraction form
    81,628.83/112,610.66 = 54,743.31/x
  3. Step 3: Cross multiply
    81,628.83x = 112,610.66 × 54,743.31
  4. Step 4: Simplify right side
    81,628.83x = 6,164,679,995.97
  5. Step 5: Solve for x
    x = 6,164,679,995.97/81,628.83
  6. Step 6: Final answer
    x = 75,520.87

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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.