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Finding the Fourth Proportional to 94.22, 129.33 and 86.93

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Solution

The fourth proportional to 94.22, 129.33 and 86.93 is: 119.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.22 : 129.33 = 86.93 : x
  2. Step 2: Convert to fraction form
    94.22/129.33 = 86.93/x
  3. Step 3: Cross multiply
    94.22x = 129.33 × 86.93
  4. Step 4: Simplify right side
    94.22x = 11,242.87
  5. Step 5: Solve for x
    x = 11,242.87/94.22
  6. Step 6: Final answer
    x = 119.33

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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.