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Finding the Fourth Proportional to 108.79, 162.26 and 92.65

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Solution

The fourth proportional to 108.79, 162.26 and 92.65 is: 138.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.79 : 162.26 = 92.65 : x
  2. Step 2: Convert to fraction form
    108.79/162.26 = 92.65/x
  3. Step 3: Cross multiply
    108.79x = 162.26 × 92.65
  4. Step 4: Simplify right side
    108.79x = 15,033.39
  5. Step 5: Solve for x
    x = 15,033.39/108.79
  6. Step 6: Final answer
    x = 138.19

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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.