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Finding the Fourth Proportional to 121,359.43, 181,896.13 and 54,721.54

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Solution

The fourth proportional to 121,359.43, 181,896.13 and 54,721.54 is: 82,017.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,359.43 : 181,896.13 = 54,721.54 : x
  2. Step 2: Convert to fraction form
    121,359.43/181,896.13 = 54,721.54/x
  3. Step 3: Cross multiply
    121,359.43x = 181,896.13 × 54,721.54
  4. Step 4: Simplify right side
    121,359.43x = 9,953,636,353.64
  5. Step 5: Solve for x
    x = 9,953,636,353.64/121,359.43
  6. Step 6: Final answer
    x = 82,017.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.