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Finding the Fourth Proportional to 185,990.97, 278,980.28 and 80,809.94

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Solution

The fourth proportional to 185,990.97, 278,980.28 and 80,809.94 is: 121,212.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,990.97 : 278,980.28 = 80,809.94 : x
  2. Step 2: Convert to fraction form
    185,990.97/278,980.28 = 80,809.94/x
  3. Step 3: Cross multiply
    185,990.97x = 278,980.28 × 80,809.94
  4. Step 4: Simplify right side
    185,990.97x = 22,544,379,687.98
  5. Step 5: Solve for x
    x = 22,544,379,687.98/185,990.97
  6. Step 6: Final answer
    x = 121,212.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.