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Finding the Fourth Proportional to 148,648.80, 205,134.30 and 80,664.04

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Solution

The fourth proportional to 148,648.80, 205,134.30 and 80,664.04 is: 111,315.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,648.80 : 205,134.30 = 80,664.04 : x
  2. Step 2: Convert to fraction form
    148,648.80/205,134.30 = 80,664.04/x
  3. Step 3: Cross multiply
    148,648.80x = 205,134.30 × 80,664.04
  4. Step 4: Simplify right side
    148,648.80x = 16,546,961,380.57
  5. Step 5: Solve for x
    x = 16,546,961,380.57/148,648.80
  6. Step 6: Final answer
    x = 111,315.81

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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.