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Finding the Fourth Proportional to 187.53, 258.68 and 122.03

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Solution

The fourth proportional to 187.53, 258.68 and 122.03 is: 168.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.53 : 258.68 = 122.03 : x
  2. Step 2: Convert to fraction form
    187.53/258.68 = 122.03/x
  3. Step 3: Cross multiply
    187.53x = 258.68 × 122.03
  4. Step 4: Simplify right side
    187.53x = 31,566.74
  5. Step 5: Solve for x
    x = 31,566.74/187.53
  6. Step 6: Final answer
    x = 168.33

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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.