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Finding the Fourth Proportional to 124.99, 171.26 and 123.17

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Solution

The fourth proportional to 124.99, 171.26 and 123.17 is: 168.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.99 : 171.26 = 123.17 : x
  2. Step 2: Convert to fraction form
    124.99/171.26 = 123.17/x
  3. Step 3: Cross multiply
    124.99x = 171.26 × 123.17
  4. Step 4: Simplify right side
    124.99x = 21,092.93
  5. Step 5: Solve for x
    x = 21,092.93/124.99
  6. Step 6: Final answer
    x = 168.76

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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.