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Finding the Fourth Proportional to 148,725.89, 205,243.29 and 80,743.49

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Solution

The fourth proportional to 148,725.89, 205,243.29 and 80,743.49 is: 111,426.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,725.89 : 205,243.29 = 80,743.49 : x
  2. Step 2: Convert to fraction form
    148,725.89/205,243.29 = 80,743.49/x
  3. Step 3: Cross multiply
    148,725.89x = 205,243.29 × 80,743.49
  4. Step 4: Simplify right side
    148,725.89x = 16,572,058,507.47
  5. Step 5: Solve for x
    x = 16,572,058,507.47/148,725.89
  6. Step 6: Final answer
    x = 111,426.86

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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.