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Finding the Fourth Proportional to 93.59, 128.31 and 92.18

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Solution

The fourth proportional to 93.59, 128.31 and 92.18 is: 126.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.59 : 128.31 = 92.18 : x
  2. Step 2: Convert to fraction form
    93.59/128.31 = 92.18/x
  3. Step 3: Cross multiply
    93.59x = 128.31 × 92.18
  4. Step 4: Simplify right side
    93.59x = 11,826.97
  5. Step 5: Solve for x
    x = 11,826.97/93.59
  6. Step 6: Final answer
    x = 126.38

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.