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Finding the Fourth Proportional to 116.34, 161.38 and 112.56

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Solution

The fourth proportional to 116.34, 161.38 and 112.56 is: 156.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.34 : 161.38 = 112.56 : x
  2. Step 2: Convert to fraction form
    116.34/161.38 = 112.56/x
  3. Step 3: Cross multiply
    116.34x = 161.38 × 112.56
  4. Step 4: Simplify right side
    116.34x = 18,164.93
  5. Step 5: Solve for x
    x = 18,164.93/116.34
  6. Step 6: Final answer
    x = 156.14

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.