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Finding the Fourth Proportional to 126, 187.75 and 112.37

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Solution

The fourth proportional to 126, 187.75 and 112.37 is: 167.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    126 : 187.75 = 112.37 : x
  2. Step 2: Convert to fraction form
    126/187.75 = 112.37/x
  3. Step 3: Cross multiply
    126x = 187.75 × 112.37
  4. Step 4: Simplify right side
    126x = 21,097.66
  5. Step 5: Solve for x
    x = 21,097.66/126
  6. Step 6: Final answer
    x = 167.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.