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Finding the Fourth Proportional to 185.71, 256.28 and 102.81

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Solution

The fourth proportional to 185.71, 256.28 and 102.81 is: 141.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.71 : 256.28 = 102.81 : x
  2. Step 2: Convert to fraction form
    185.71/256.28 = 102.81/x
  3. Step 3: Cross multiply
    185.71x = 256.28 × 102.81
  4. Step 4: Simplify right side
    185.71x = 26,347.63
  5. Step 5: Solve for x
    x = 26,347.63/185.71
  6. Step 6: Final answer
    x = 141.88

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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.