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Finding the Fourth Proportional to 81,053.79, 111,853.92 and 45,243.48

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Solution

The fourth proportional to 81,053.79, 111,853.92 and 45,243.48 is: 62,435.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,053.79 : 111,853.92 = 45,243.48 : x
  2. Step 2: Convert to fraction form
    81,053.79/111,853.92 = 45,243.48/x
  3. Step 3: Cross multiply
    81,053.79x = 111,853.92 × 45,243.48
  4. Step 4: Simplify right side
    81,053.79x = 5,060,660,592.44
  5. Step 5: Solve for x
    x = 5,060,660,592.44/81,053.79
  6. Step 6: Final answer
    x = 62,435.83

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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.