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Finding the Fourth Proportional to 200.84, 277.16 and 123.21

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Solution

The fourth proportional to 200.84, 277.16 and 123.21 is: 170.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.84 : 277.16 = 123.21 : x
  2. Step 2: Convert to fraction form
    200.84/277.16 = 123.21/x
  3. Step 3: Cross multiply
    200.84x = 277.16 × 123.21
  4. Step 4: Simplify right side
    200.84x = 34,148.27
  5. Step 5: Solve for x
    x = 34,148.27/200.84
  6. Step 6: Final answer
    x = 170.03

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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.