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Finding the Fourth Proportional to 140.60, 193.74 and 103.70

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Solution

The fourth proportional to 140.60, 193.74 and 103.70 is: 142.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.60 : 193.74 = 103.70 : x
  2. Step 2: Convert to fraction form
    140.60/193.74 = 103.70/x
  3. Step 3: Cross multiply
    140.60x = 193.74 × 103.70
  4. Step 4: Simplify right side
    140.60x = 20,090.84
  5. Step 5: Solve for x
    x = 20,090.84/140.60
  6. Step 6: Final answer
    x = 142.89

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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.