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Finding the Fourth Proportional to 187.75, 259.10 and 122.14

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Solution

The fourth proportional to 187.75, 259.10 and 122.14 is: 168.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.75 : 259.10 = 122.14 : x
  2. Step 2: Convert to fraction form
    187.75/259.10 = 122.14/x
  3. Step 3: Cross multiply
    187.75x = 259.10 × 122.14
  4. Step 4: Simplify right side
    187.75x = 31,646.65
  5. Step 5: Solve for x
    x = 31,646.65/187.75
  6. Step 6: Final answer
    x = 168.56

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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.