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Finding the Fourth Proportional to 148,873.90, 205,443.49 and 80,891.92

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Solution

The fourth proportional to 148,873.90, 205,443.49 and 80,891.92 is: 111,629.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,873.90 : 205,443.49 = 80,891.92 : x
  2. Step 2: Convert to fraction form
    148,873.90/205,443.49 = 80,891.92/x
  3. Step 3: Cross multiply
    148,873.90x = 205,443.49 × 80,891.92
  4. Step 4: Simplify right side
    148,873.90x = 16,618,718,357.60
  5. Step 5: Solve for x
    x = 16,618,718,357.60/148,873.90
  6. Step 6: Final answer
    x = 111,629.50

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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.