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Finding the Fourth Proportional to 186.97, 279.99 and 129.25

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Solution

The fourth proportional to 186.97, 279.99 and 129.25 is: 193.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.97 : 279.99 = 129.25 : x
  2. Step 2: Convert to fraction form
    186.97/279.99 = 129.25/x
  3. Step 3: Cross multiply
    186.97x = 279.99 × 129.25
  4. Step 4: Simplify right side
    186.97x = 36,188.71
  5. Step 5: Solve for x
    x = 36,188.71/186.97
  6. Step 6: Final answer
    x = 193.55

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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.