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Finding the Fourth Proportional to 186.15, 256.89 and 103.27

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Solution

The fourth proportional to 186.15, 256.89 and 103.27 is: 142.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.15 : 256.89 = 103.27 : x
  2. Step 2: Convert to fraction form
    186.15/256.89 = 103.27/x
  3. Step 3: Cross multiply
    186.15x = 256.89 × 103.27
  4. Step 4: Simplify right side
    186.15x = 26,529.69
  5. Step 5: Solve for x
    x = 26,529.69/186.15
  6. Step 6: Final answer
    x = 142.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.