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Finding the Fourth Proportional to 185,930.80, 278,866.84 and 80,721.52

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Solution

The fourth proportional to 185,930.80, 278,866.84 and 80,721.52 is: 121,069.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,930.80 : 278,866.84 = 80,721.52 : x
  2. Step 2: Convert to fraction form
    185,930.80/278,866.84 = 80,721.52/x
  3. Step 3: Cross multiply
    185,930.80x = 278,866.84 × 80,721.52
  4. Step 4: Simplify right side
    185,930.80x = 22,510,555,202.40
  5. Step 5: Solve for x
    x = 22,510,555,202.40/185,930.80
  6. Step 6: Final answer
    x = 121,069.53

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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.