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Finding the Fourth Proportional to 148,874.30, 205,447.79 and 80,891.28

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Solution

The fourth proportional to 148,874.30, 205,447.79 and 80,891.28 is: 111,630.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,874.30 : 205,447.79 = 80,891.28 : x
  2. Step 2: Convert to fraction form
    148,874.30/205,447.79 = 80,891.28/x
  3. Step 3: Cross multiply
    148,874.30x = 205,447.79 × 80,891.28
  4. Step 4: Simplify right side
    148,874.30x = 16,618,934,447.45
  5. Step 5: Solve for x
    x = 16,618,934,447.45/148,874.30
  6. Step 6: Final answer
    x = 111,630.64

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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.