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Finding the Fourth Proportional to 141.72, 195.48 and 100.32

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Solution

The fourth proportional to 141.72, 195.48 and 100.32 is: 138.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.72 : 195.48 = 100.32 : x
  2. Step 2: Convert to fraction form
    141.72/195.48 = 100.32/x
  3. Step 3: Cross multiply
    141.72x = 195.48 × 100.32
  4. Step 4: Simplify right side
    141.72x = 19,610.55
  5. Step 5: Solve for x
    x = 19,610.55/141.72
  6. Step 6: Final answer
    x = 138.38

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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.