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Finding the Fourth Proportional to 93.87, 129.44 and 92.66

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Solution

The fourth proportional to 93.87, 129.44 and 92.66 is: 127.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.87 : 129.44 = 92.66 : x
  2. Step 2: Convert to fraction form
    93.87/129.44 = 92.66/x
  3. Step 3: Cross multiply
    93.87x = 129.44 × 92.66
  4. Step 4: Simplify right side
    93.87x = 11,993.49
  5. Step 5: Solve for x
    x = 11,993.49/93.87
  6. Step 6: Final answer
    x = 127.77

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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.