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Finding the Fourth Proportional to 148,644.80, 205,128.78 and 80,660.04

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Solution

The fourth proportional to 148,644.80, 205,128.78 and 80,660.04 is: 111,310.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,644.80 : 205,128.78 = 80,660.04 : x
  2. Step 2: Convert to fraction form
    148,644.80/205,128.78 = 80,660.04/x
  3. Step 3: Cross multiply
    148,644.80x = 205,128.78 × 80,660.04
  4. Step 4: Simplify right side
    148,644.80x = 16,545,695,599.95
  5. Step 5: Solve for x
    x = 16,545,695,599.95/148,644.80
  6. Step 6: Final answer
    x = 111,310.29

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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.