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Finding the Fourth Proportional to 136.43, 188.10 and 92.81

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Solution

The fourth proportional to 136.43, 188.10 and 92.81 is: 127.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.43 : 188.10 = 92.81 : x
  2. Step 2: Convert to fraction form
    136.43/188.10 = 92.81/x
  3. Step 3: Cross multiply
    136.43x = 188.10 × 92.81
  4. Step 4: Simplify right side
    136.43x = 17,457.56
  5. Step 5: Solve for x
    x = 17,457.56/136.43
  6. Step 6: Final answer
    x = 127.96

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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.