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Finding the Fourth Proportional to 206.12, 284.36 and 123.24

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Solution

The fourth proportional to 206.12, 284.36 and 123.24 is: 170.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.12 : 284.36 = 123.24 : x
  2. Step 2: Convert to fraction form
    206.12/284.36 = 123.24/x
  3. Step 3: Cross multiply
    206.12x = 284.36 × 123.24
  4. Step 4: Simplify right side
    206.12x = 35,044.53
  5. Step 5: Solve for x
    x = 35,044.53/206.12
  6. Step 6: Final answer
    x = 170.02

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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.