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Finding the Fourth Proportional to 94.23, 129.51 and 81.27

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Solution

The fourth proportional to 94.23, 129.51 and 81.27 is: 111.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.23 : 129.51 = 81.27 : x
  2. Step 2: Convert to fraction form
    94.23/129.51 = 81.27/x
  3. Step 3: Cross multiply
    94.23x = 129.51 × 81.27
  4. Step 4: Simplify right side
    94.23x = 10,525.28
  5. Step 5: Solve for x
    x = 10,525.28/94.23
  6. Step 6: Final answer
    x = 111.70

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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.