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Finding the Fourth Proportional to 186,990.96, 280,319.64 and 68,634.84

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Solution

The fourth proportional to 186,990.96, 280,319.64 and 68,634.84 is: 102,891.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,990.96 : 280,319.64 = 68,634.84 : x
  2. Step 2: Convert to fraction form
    186,990.96/280,319.64 = 68,634.84/x
  3. Step 3: Cross multiply
    186,990.96x = 280,319.64 × 68,634.84
  4. Step 4: Simplify right side
    186,990.96x = 19,239,693,640.26
  5. Step 5: Solve for x
    x = 19,239,693,640.26/186,990.96
  6. Step 6: Final answer
    x = 102,891.04

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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.