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Finding the Fourth Proportional to 126.19, 173.64 and 123

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Solution

The fourth proportional to 126.19, 173.64 and 123 is: 169.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.19 : 173.64 = 123 : x
  2. Step 2: Convert to fraction form
    126.19/173.64 = 123/x
  3. Step 3: Cross multiply
    126.19x = 173.64 × 123
  4. Step 4: Simplify right side
    126.19x = 21,357.72
  5. Step 5: Solve for x
    x = 21,357.72/126.19
  6. Step 6: Final answer
    x = 169.25

Related Problems

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1.5x scale

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.