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Finding the Fourth Proportional to 93.92, 140.09 and 92.57

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Solution

The fourth proportional to 93.92, 140.09 and 92.57 is: 138.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.92 : 140.09 = 92.57 : x
  2. Step 2: Convert to fraction form
    93.92/140.09 = 92.57/x
  3. Step 3: Cross multiply
    93.92x = 140.09 × 92.57
  4. Step 4: Simplify right side
    93.92x = 12,966.97
  5. Step 5: Solve for x
    x = 12,966.97/93.92
  6. Step 6: Final answer
    x = 138.07

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.