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Finding the Fourth Proportional to 94.31, 142.18 and 93.09

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Solution

The fourth proportional to 94.31, 142.18 and 93.09 is: 140.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.31 : 142.18 = 93.09 : x
  2. Step 2: Convert to fraction form
    94.31/142.18 = 93.09/x
  3. Step 3: Cross multiply
    94.31x = 142.18 × 93.09
  4. Step 4: Simplify right side
    94.31x = 13,235.54
  5. Step 5: Solve for x
    x = 13,235.54/94.31
  6. Step 6: Final answer
    x = 140.35

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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.