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Finding the Fourth Proportional to 141.15, 194.75 and 85.16

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Solution

The fourth proportional to 141.15, 194.75 and 85.16 is: 117.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.15 : 194.75 = 85.16 : x
  2. Step 2: Convert to fraction form
    141.15/194.75 = 85.16/x
  3. Step 3: Cross multiply
    141.15x = 194.75 × 85.16
  4. Step 4: Simplify right side
    141.15x = 16,584.91
  5. Step 5: Solve for x
    x = 16,584.91/141.15
  6. Step 6: Final answer
    x = 117.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.