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Finding the Fourth Proportional to 126.89, 175.13 and 118.65

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Solution

The fourth proportional to 126.89, 175.13 and 118.65 is: 163.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.89 : 175.13 = 118.65 : x
  2. Step 2: Convert to fraction form
    126.89/175.13 = 118.65/x
  3. Step 3: Cross multiply
    126.89x = 175.13 × 118.65
  4. Step 4: Simplify right side
    126.89x = 20,779.17
  5. Step 5: Solve for x
    x = 20,779.17/126.89
  6. Step 6: Final answer
    x = 163.76

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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.