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Finding the Fourth Proportional to 169, 233.22 and 91.38

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Solution

The fourth proportional to 169, 233.22 and 91.38 is: 126.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    169 : 233.22 = 91.38 : x
  2. Step 2: Convert to fraction form
    169/233.22 = 91.38/x
  3. Step 3: Cross multiply
    169x = 233.22 × 91.38
  4. Step 4: Simplify right side
    169x = 21,310.48
  5. Step 5: Solve for x
    x = 21,310.48/169
  6. Step 6: Final answer
    x = 126.10

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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.