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Finding the Fourth Proportional to 186,867.55, 280,134.67 and 68,511.31

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Solution

The fourth proportional to 186,867.55, 280,134.67 and 68,511.31 is: 102,705.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,867.55 : 280,134.67 = 68,511.31 : x
  2. Step 2: Convert to fraction form
    186,867.55/280,134.67 = 68,511.31/x
  3. Step 3: Cross multiply
    186,867.55x = 280,134.67 × 68,511.31
  4. Step 4: Simplify right side
    186,867.55x = 19,192,393,218.12
  5. Step 5: Solve for x
    x = 19,192,393,218.12/186,867.55
  6. Step 6: Final answer
    x = 102,705.86

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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.