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Finding the Fourth Proportional to 94.10, 128.05 and 93.64

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Solution

The fourth proportional to 94.10, 128.05 and 93.64 is: 127.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.10 : 128.05 = 93.64 : x
  2. Step 2: Convert to fraction form
    94.10/128.05 = 93.64/x
  3. Step 3: Cross multiply
    94.10x = 128.05 × 93.64
  4. Step 4: Simplify right side
    94.10x = 11,990.05
  5. Step 5: Solve for x
    x = 11,990.05/94.10
  6. Step 6: Final answer
    x = 127.42

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.