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Finding the Fourth Proportional to 93.11, 127.79 and 89.15

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Solution

The fourth proportional to 93.11, 127.79 and 89.15 is: 122.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.11 : 127.79 = 89.15 : x
  2. Step 2: Convert to fraction form
    93.11/127.79 = 89.15/x
  3. Step 3: Cross multiply
    93.11x = 127.79 × 89.15
  4. Step 4: Simplify right side
    93.11x = 11,391.39
  5. Step 5: Solve for x
    x = 11,391.39/93.11
  6. Step 6: Final answer
    x = 122.35

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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.