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Finding the Fourth Proportional to 148,874.68, 205,448.31 and 80,891.66

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Solution

The fourth proportional to 148,874.68, 205,448.31 and 80,891.66 is: 111,631.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,874.68 : 205,448.31 = 80,891.66 : x
  2. Step 2: Convert to fraction form
    148,874.68/205,448.31 = 80,891.66/x
  3. Step 3: Cross multiply
    148,874.68x = 205,448.31 × 80,891.66
  4. Step 4: Simplify right side
    148,874.68x = 16,619,053,812.85
  5. Step 5: Solve for x
    x = 16,619,053,812.85/148,874.68
  6. Step 6: Final answer
    x = 111,631.17

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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.