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Finding the Fourth Proportional to 207.21, 285.94 and 124.36

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Solution

The fourth proportional to 207.21, 285.94 and 124.36 is: 171.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.21 : 285.94 = 124.36 : x
  2. Step 2: Convert to fraction form
    207.21/285.94 = 124.36/x
  3. Step 3: Cross multiply
    207.21x = 285.94 × 124.36
  4. Step 4: Simplify right side
    207.21x = 35,558.94
  5. Step 5: Solve for x
    x = 35,558.94/207.21
  6. Step 6: Final answer
    x = 171.61

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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.