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Finding the Fourth Proportional to 179.73, 268.93 and 128.49

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Solution

The fourth proportional to 179.73, 268.93 and 128.49 is: 192.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.73 : 268.93 = 128.49 : x
  2. Step 2: Convert to fraction form
    179.73/268.93 = 128.49/x
  3. Step 3: Cross multiply
    179.73x = 268.93 × 128.49
  4. Step 4: Simplify right side
    179.73x = 34,554.82
  5. Step 5: Solve for x
    x = 34,554.82/179.73
  6. Step 6: Final answer
    x = 192.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.