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Finding the Fourth Proportional to 141.79, 195.60 and 100.39

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Solution

The fourth proportional to 141.79, 195.60 and 100.39 is: 138.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.79 : 195.60 = 100.39 : x
  2. Step 2: Convert to fraction form
    141.79/195.60 = 100.39/x
  3. Step 3: Cross multiply
    141.79x = 195.60 × 100.39
  4. Step 4: Simplify right side
    141.79x = 19,636.28
  5. Step 5: Solve for x
    x = 19,636.28/141.79
  6. Step 6: Final answer
    x = 138.49

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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.