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Finding the Fourth Proportional to 193.12, 266.38 and 123.20

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Solution

The fourth proportional to 193.12, 266.38 and 123.20 is: 169.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.12 : 266.38 = 123.20 : x
  2. Step 2: Convert to fraction form
    193.12/266.38 = 123.20/x
  3. Step 3: Cross multiply
    193.12x = 266.38 × 123.20
  4. Step 4: Simplify right side
    193.12x = 32,818.02
  5. Step 5: Solve for x
    x = 32,818.02/193.12
  6. Step 6: Final answer
    x = 169.94

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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.