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Finding the Fourth Proportional to 123.60, 170.24 and 97.68

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Solution

The fourth proportional to 123.60, 170.24 and 97.68 is: 134.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.60 : 170.24 = 97.68 : x
  2. Step 2: Convert to fraction form
    123.60/170.24 = 97.68/x
  3. Step 3: Cross multiply
    123.60x = 170.24 × 97.68
  4. Step 4: Simplify right side
    123.60x = 16,629.04
  5. Step 5: Solve for x
    x = 16,629.04/123.60
  6. Step 6: Final answer
    x = 134.54

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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.