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Finding the Fourth Proportional to 94.39, 141.50 and 63.90

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Solution

The fourth proportional to 94.39, 141.50 and 63.90 is: 95.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.39 : 141.50 = 63.90 : x
  2. Step 2: Convert to fraction form
    94.39/141.50 = 63.90/x
  3. Step 3: Cross multiply
    94.39x = 141.50 × 63.90
  4. Step 4: Simplify right side
    94.39x = 9,042.01
  5. Step 5: Solve for x
    x = 9,042.01/94.39
  6. Step 6: Final answer
    x = 95.80

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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.