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Finding the Fourth Proportional to 200.80, 277.11 and 123.13

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Solution

The fourth proportional to 200.80, 277.11 and 123.13 is: 169.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.80 : 277.11 = 123.13 : x
  2. Step 2: Convert to fraction form
    200.80/277.11 = 123.13/x
  3. Step 3: Cross multiply
    200.80x = 277.11 × 123.13
  4. Step 4: Simplify right side
    200.80x = 34,118.55
  5. Step 5: Solve for x
    x = 34,118.55/200.80
  6. Step 6: Final answer
    x = 169.92

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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.