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Finding the Fourth Proportional to 94.18, 141.32 and 45.49

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Solution

The fourth proportional to 94.18, 141.32 and 45.49 is: 68.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.18 : 141.32 = 45.49 : x
  2. Step 2: Convert to fraction form
    94.18/141.32 = 45.49/x
  3. Step 3: Cross multiply
    94.18x = 141.32 × 45.49
  4. Step 4: Simplify right side
    94.18x = 6,428.65
  5. Step 5: Solve for x
    x = 6,428.65/94.18
  6. Step 6: Final answer
    x = 68.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.