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Finding the Fourth Proportional to 94.34, 142.20 and 92.18

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Solution

The fourth proportional to 94.34, 142.20 and 92.18 is: 138.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.34 : 142.20 = 92.18 : x
  2. Step 2: Convert to fraction form
    94.34/142.20 = 92.18/x
  3. Step 3: Cross multiply
    94.34x = 142.20 × 92.18
  4. Step 4: Simplify right side
    94.34x = 13,108.00
  5. Step 5: Solve for x
    x = 13,108.00/94.34
  6. Step 6: Final answer
    x = 138.94

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.