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Finding the Fourth Proportional to 125.27, 171.76 and 123.08

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Solution

The fourth proportional to 125.27, 171.76 and 123.08 is: 168.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.27 : 171.76 = 123.08 : x
  2. Step 2: Convert to fraction form
    125.27/171.76 = 123.08/x
  3. Step 3: Cross multiply
    125.27x = 171.76 × 123.08
  4. Step 4: Simplify right side
    125.27x = 21,140.22
  5. Step 5: Solve for x
    x = 21,140.22/125.27
  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.