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Finding the Fourth Proportional to 124.96, 171.40 and 122.60

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Solution

The fourth proportional to 124.96, 171.40 and 122.60 is: 168.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.96 : 171.40 = 122.60 : x
  2. Step 2: Convert to fraction form
    124.96/171.40 = 122.60/x
  3. Step 3: Cross multiply
    124.96x = 171.40 × 122.60
  4. Step 4: Simplify right side
    124.96x = 21,013.64
  5. Step 5: Solve for x
    x = 21,013.64/124.96
  6. Step 6: Final answer
    x = 168.16

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.