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Finding the Fourth Proportional to 186,879.20, 280,355.72 and 68,551.56

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Solution

The fourth proportional to 186,879.20, 280,355.72 and 68,551.56 is: 102,840.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,879.20 : 280,355.72 = 68,551.56 : x
  2. Step 2: Convert to fraction form
    186,879.20/280,355.72 = 68,551.56/x
  3. Step 3: Cross multiply
    186,879.20x = 280,355.72 × 68,551.56
  4. Step 4: Simplify right side
    186,879.20x = 19,218,821,618.17
  5. Step 5: Solve for x
    x = 19,218,821,618.17/186,879.20
  6. Step 6: Final answer
    x = 102,840.88

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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.