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Finding the Fourth Proportional to 141.01, 194.59 and 85.74

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Solution

The fourth proportional to 141.01, 194.59 and 85.74 is: 118.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.01 : 194.59 = 85.74 : x
  2. Step 2: Convert to fraction form
    141.01/194.59 = 85.74/x
  3. Step 3: Cross multiply
    141.01x = 194.59 × 85.74
  4. Step 4: Simplify right side
    141.01x = 16,684.14
  5. Step 5: Solve for x
    x = 16,684.14/141.01
  6. Step 6: Final answer
    x = 118.32

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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.