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Finding the Fourth Proportional to 125.40, 171.63 and 122.37

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Solution

The fourth proportional to 125.40, 171.63 and 122.37 is: 167.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.40 : 171.63 = 122.37 : x
  2. Step 2: Convert to fraction form
    125.40/171.63 = 122.37/x
  3. Step 3: Cross multiply
    125.40x = 171.63 × 122.37
  4. Step 4: Simplify right side
    125.40x = 21,002.36
  5. Step 5: Solve for x
    x = 21,002.36/125.40
  6. Step 6: Final answer
    x = 167.48

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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.