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Finding the Fourth Proportional to 186.68, 279.46 and 125.72

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Solution

The fourth proportional to 186.68, 279.46 and 125.72 is: 188.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.68 : 279.46 = 125.72 : x
  2. Step 2: Convert to fraction form
    186.68/279.46 = 125.72/x
  3. Step 3: Cross multiply
    186.68x = 279.46 × 125.72
  4. Step 4: Simplify right side
    186.68x = 35,133.71
  5. Step 5: Solve for x
    x = 35,133.71/186.68
  6. Step 6: Final answer
    x = 188.20

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.