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Finding the Fourth Proportional to 140.10, 193.42 and 103.36

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Solution

The fourth proportional to 140.10, 193.42 and 103.36 is: 142.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.10 : 193.42 = 103.36 : x
  2. Step 2: Convert to fraction form
    140.10/193.42 = 103.36/x
  3. Step 3: Cross multiply
    140.10x = 193.42 × 103.36
  4. Step 4: Simplify right side
    140.10x = 19,991.89
  5. Step 5: Solve for x
    x = 19,991.89/140.10
  6. Step 6: Final answer
    x = 142.70

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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.