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Finding the Fourth Proportional to 123.09, 169.47 and 114.81

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Solution

The fourth proportional to 123.09, 169.47 and 114.81 is: 158.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.09 : 169.47 = 114.81 : x
  2. Step 2: Convert to fraction form
    123.09/169.47 = 114.81/x
  3. Step 3: Cross multiply
    123.09x = 169.47 × 114.81
  4. Step 4: Simplify right side
    123.09x = 19,456.85
  5. Step 5: Solve for x
    x = 19,456.85/123.09
  6. Step 6: Final answer
    x = 158.07

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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.