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Finding the Fourth Proportional to 112.34, 168.27 and 82.07

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Solution

The fourth proportional to 112.34, 168.27 and 82.07 is: 122.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.34 : 168.27 = 82.07 : x
  2. Step 2: Convert to fraction form
    112.34/168.27 = 82.07/x
  3. Step 3: Cross multiply
    112.34x = 168.27 × 82.07
  4. Step 4: Simplify right side
    112.34x = 13,809.08
  5. Step 5: Solve for x
    x = 13,809.08/112.34
  6. Step 6: Final answer
    x = 122.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.