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Finding the Fourth Proportional to 148,644.56, 205,128.44 and 80,659.80

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Solution

The fourth proportional to 148,644.56, 205,128.44 and 80,659.80 is: 111,309.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,644.56 : 205,128.44 = 80,659.80 : x
  2. Step 2: Convert to fraction form
    148,644.56/205,128.44 = 80,659.80/x
  3. Step 3: Cross multiply
    148,644.56x = 205,128.44 × 80,659.80
  4. Step 4: Simplify right side
    148,644.56x = 16,545,618,541.41
  5. Step 5: Solve for x
    x = 16,545,618,541.41/148,644.56
  6. Step 6: Final answer
    x = 111,309.95

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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.