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Finding the Fourth Proportional to 141.76, 195.58 and 100.38

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Solution

The fourth proportional to 141.76, 195.58 and 100.38 is: 138.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.76 : 195.58 = 100.38 : x
  2. Step 2: Convert to fraction form
    141.76/195.58 = 100.38/x
  3. Step 3: Cross multiply
    141.76x = 195.58 × 100.38
  4. Step 4: Simplify right side
    141.76x = 19,632.32
  5. Step 5: Solve for x
    x = 19,632.32/141.76
  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.