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Finding the Fourth Proportional to 178.89, 268.35 and 76.17

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Solution

The fourth proportional to 178.89, 268.35 and 76.17 is: 114.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.89 : 268.35 = 76.17 : x
  2. Step 2: Convert to fraction form
    178.89/268.35 = 76.17/x
  3. Step 3: Cross multiply
    178.89x = 268.35 × 76.17
  4. Step 4: Simplify right side
    178.89x = 20,440.22
  5. Step 5: Solve for x
    x = 20,440.22/178.89
  6. Step 6: Final answer
    x = 114.26

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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.