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Finding the Fourth Proportional to 141.12, 194.58 and 117.90

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Solution

The fourth proportional to 141.12, 194.58 and 117.90 is: 162.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.12 : 194.58 = 117.90 : x
  2. Step 2: Convert to fraction form
    141.12/194.58 = 117.90/x
  3. Step 3: Cross multiply
    141.12x = 194.58 × 117.90
  4. Step 4: Simplify right side
    141.12x = 22,940.98
  5. Step 5: Solve for x
    x = 22,940.98/141.12
  6. Step 6: Final answer
    x = 162.56

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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.