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Finding the Fourth Proportional to 141.28, 195.05 and 91.51

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Solution

The fourth proportional to 141.28, 195.05 and 91.51 is: 126.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.28 : 195.05 = 91.51 : x
  2. Step 2: Convert to fraction form
    141.28/195.05 = 91.51/x
  3. Step 3: Cross multiply
    141.28x = 195.05 × 91.51
  4. Step 4: Simplify right side
    141.28x = 17,849.03
  5. Step 5: Solve for x
    x = 17,849.03/141.28
  6. Step 6: Final answer
    x = 126.34

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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.